[Build][AArch64 Host] Add needed libs for cross-compiling;Add needed headerfiles for compiling cpp files · Pull Request !381 · OpenHarmony/third_party_llvm-project

### Issue
https://gitee.com/openharmony/third_party_llvm-project/issues/I91X8G

### Reason (Purpose, Solved Problem)
1. Currently, clang does not support cross-compiling for other platforms because the cmake compilation parameters only specify AArch64 for LLVM_TARGETS_TO_BUILD:
` ./bin/clang-15 test.c -o test --sysroot=sysroot -v --target=arm-linux-ohos`
```
clang version 15.0.4 (https://gitee.com/openharmony/third_party_llvm-project 47a055100830208c7a39e84df91ba81e91065959)
Target: arm-unknown-linux-ohos
Thread model: posix
InstalledDir: /data/llvm/./bin
 "/data/llvm/bin/clang-15" -cc1 -triple armv4t-unknown-linux-ohos -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-cpu arm7tdmi -target-feature +soft-float -target-feature +soft-float-abi -target-feature -vfp2 -target-feature -vfp2sp -target-feature -vfp3 -target-feature -vfp3d16 -target-feature -vfp3d16sp -target-feature -vfp3sp -target-feature -fp16 -target-feature -vfp4 -target-feature -vfp4d16 -target-feature -vfp4d16sp -target-feature -vfp4sp -target-feature -fp-armv8 -target-feature -fp-armv8d16 -target-feature -fp-armv8d16sp -target-feature -fp-armv8sp -target-feature -fullfp16 -target-feature -fp64 -target-feature -d32 -target-feature -neon -target-feature -sha2 -target-feature -aes -target-feature -dotprod -target-feature -fp16fml -target-feature -bf16 -target-feature -mve -target-feature -mve.fp -target-feature -fpregs -target-feature +strict-align -target-abi aapcs-linux -msoft-float -mfloat-abi soft -Wunaligned-access -fallow-half-arguments-and-returns -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -v -fcoverage-compilation-dir=/data/llvm -resource-dir /data/llvm/lib/clang/15.0.4 -isysroot sysroot -internal-isystem /data/llvm/lib/clang/15.0.4/include -internal-externc-isystem sysroot/arm-linux-ohos/usr/include/arm-linux-ohos -internal-externc-isystem sysroot/arm-linux-ohos/include -internal-externc-isystem sysroot/arm-linux-ohos/usr/include -fdebug-compilation-dir=/data/llvm -ferror-limit 19 -fno-signed-char -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -o /data/local/tmp/test-5436c7.o -x c test.c
clang -cc1 version 15.0.4 based upon LLVM 15.0.4 default target aarch64-linux-ohos
ignoring nonexistent directory "sysroot/arm-linux-ohos/usr/include/arm-linux-ohos"
ignoring nonexistent directory "sysroot/arm-linux-ohos/include"
#include "..." search starts here:
#include <...> search starts here:
 /data/llvm/lib/clang/15.0.4/include
 sysroot/arm-linux-ohos/usr/include
End of search list.
error: unable to create target: 'No available targets are compatible with triple "armv4t-unknown-linux-ohos"'
1 error generated.
```
2. The toolchain(ohos-aarch64-install) is missing the header files required for compiling C++ code.
![输入图片说明](https://foruda.gitee.com/images/1707372208279135180/298c9133_8031907.png "屏幕截图")
### Description
1. Add cmake options to support cross-compilation.
2. Copy the required runtime libraries for cross-compilation.
3. Copy the header files needed for compiling the CPP files.

### Test (Local test)
1. test cross-compilation to arm-linux-ohos(`./bin/clang ./testfile/test.c -o test --sysroot=../sysroot --target=arm-linux-ohos -v`)
```shell
>> ./bin/clang ./testfile/test.c -o test --sysroot=../sysroot --target=arm-linux-ohos -v
clang version 15.0.4 (https://gitee.com/openharmony/third_party_llvm-project 47a055100830208c7a39e84df91ba81e91065959)
Target: arm-unknown-linux-ohos
Thread model: posix
InstalledDir: /data/llvm/./bin
 "/data/llvm/bin/clang-15" -cc1 -triple armv4t-unknown-linux-ohos -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-cpu arm7tdmi -target-feature +soft-float -target-feature +soft-float-abi -target-feature -vfp2 -target-feature -vfp2sp -target-feature -vfp3 -target-feature -vfp3d16 -target-feature -vfp3d16sp -target-feature -vfp3sp -target-feature -fp16 -target-feature -vfp4 -target-feature -vfp4d16 -target-feature -vfp4d16sp -target-feature -vfp4sp -target-feature -fp-armv8 -target-feature -fp-armv8d16 -target-feature -fp-armv8d16sp -target-feature -fp-armv8sp -target-feature -fullfp16 -target-feature -fp64 -target-feature -d32 -target-feature -neon -target-feature -sha2 -target-feature -aes -target-feature -dotprod -target-feature -fp16fml -target-feature -bf16 -target-feature -mve -target-feature -mve.fp -target-feature -fpregs -target-feature +strict-align -target-abi aapcs-linux -msoft-float -mfloat-abi soft -Wunaligned-access -fallow-half-arguments-and-returns -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -v -fcoverage-compilation-dir=/data/llvm -resource-dir /data/llvm/lib/clang/15.0.4 -isysroot ../sysroot -internal-isystem /data/llvm/lib/clang/15.0.4/include -internal-externc-isystem ../sysroot/arm-linux-ohos/usr/include/arm-linux-ohos -internal-externc-isystem ../sysroot/arm-linux-ohos/include -internal-externc-isystem ../sysroot/arm-linux-ohos/usr/include -fdebug-compilation-dir=/data/llvm -ferror-limit 19 -fno-signed-char -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -o /data/local/tmp/test-1ee13b.o -x c ./testfile/test.c
clang -cc1 version 15.0.4 based upon LLVM 15.0.4 default target aarch64-linux-ohos
ignoring nonexistent directory "../sysroot/arm-linux-ohos/usr/include/arm-linux-ohos"
ignoring nonexistent directory "../sysroot/arm-linux-ohos/include"
#include "..." search starts here:
#include <...> search starts here:
 /data/llvm/lib/clang/15.0.4/include
 ../sysroot/arm-linux-ohos/usr/include
End of search list.
 "/data/llvm/./bin/ld.lld" --sysroot=../sysroot -pie -EL -z now -z relro -z max-page-size=4096 --hash-style=gnu --hash-style=both --enable-new-dtags --eh-frame-hdr -m armelf_linux_eabi -dynamic-linker /lib/ld-musl-arm.so.1 -o test ../sysroot/arm-linux-ohos/usr/lib/Scrt1.o ../sysroot/arm-linux-ohos/usr/lib/crti.o /data/llvm/lib/clang/15.0.4/lib/arm-linux-ohos/clang_rt.crtbegin.o -L/data/llvm/lib/clang/15.0.4/lib/arm-linux-ohos -L../sysroot/arm-linux-ohos/usr/lib/ -L/data/llvm/bin/../lib/arm-linux-ohos/ /data/local/tmp/test-1ee13b.o /data/llvm/lib/clang/15.0.4/lib/arm-linux-ohos/libclang_rt.builtins.a -l:libunwind.a -lc /data/llvm/lib/clang/15.0.4/lib/arm-linux-ohos/libclang_rt.builtins.a -l:libunwind.a /data/llvm/lib/clang/15.0.4/lib/arm-linux-ohos/clang_rt.crtend.o ../sysroot/arm-linux-ohos/usr/lib/crtn.o
>> ./testfile/test
Hello, World!
```
2. test compilation cpp files(`./bin/clang++ ./testfile/buffer.cpp -o buffer --sysroot=../sysroot -v`)
```
# ./bin/clang++ ./testfile/buffer.cpp -o buffer --sysroot=../sysroot -v
clang version 15.0.4 (https://gitee.com/openharmony/third_party_llvm-project 47a055100830208c7a39e84df91ba81e91065959)
Target: aarch64-unknown-linux-ohos
Thread model: posix
InstalledDir: /data/llvm/./bin
 "/data/llvm/bin/clang-15" -cc1 -triple aarch64-unknown-linux-ohos -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name buffer.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=non-leaf -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-cpu generic -target-feature +neon -target-feature +v8a -target-feature +fix-cortex-a53-835769 -target-abi aapcs -fallow-half-arguments-and-returns -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -v -fcoverage-compilation-dir=/data/llvm -resource-dir /data/llvm/lib/clang/15.0.4 -isysroot ../sysroot -internal-isystem /data/llvm/bin/../include/libcxx-ohos/include/c++/v1 -internal-isystem /data/llvm/lib/clang/15.0.4/include -internal-externc-isystem ../sysroot/aarch64-linux-ohos/usr/include/aarch64-linux-ohos -internal-externc-isystem ../sysroot/aarch64-linux-ohos/include -internal-externc-isystem ../sysroot/aarch64-linux-ohos/usr/include -fdeprecated-macro -fdebug-compilation-dir=/data/llvm -ferror-limit 19 -fno-signed-char -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /data/local/tmp/buffer-b81a57.o -x c++ ./testfile/buffer.cpp
clang -cc1 version 15.0.4 based upon LLVM 15.0.4 default target aarch64-linux-ohos
ignoring nonexistent directory "../sysroot/aarch64-linux-ohos/usr/include/aarch64-linux-ohos"
ignoring nonexistent directory "../sysroot/aarch64-linux-ohos/include"
#include "..." search starts here:
#include <...> search starts here:
 /data/llvm/bin/../include/libcxx-ohos/include/c++/v1
 /data/llvm/lib/clang/15.0.4/include
 ../sysroot/aarch64-linux-ohos/usr/include
End of search list.
./testfile/buffer.cpp:5:5: warning: array index 10 is past the end of the array (which contains 5 elements) [-Warray-bounds]
    buffer[10] = 42; 
    ^      ~~
./testfile/buffer.cpp:4:5: note: array 'buffer' declared here
    int buffer[5];
    ^
1 warning generated.
 "/data/llvm/./bin/ld.lld" --sysroot=../sysroot -pie -EL --fix-cortex-a53-843419 -z now -z relro -z max-page-size=4096 --hash-style=gnu --hash-style=both --enable-new-dtags --eh-frame-hdr -m aarch64linux -dynamic-linker /lib/ld-musl-aarch64.so.1 -o buffer ../sysroot/aarch64-linux-ohos/usr/lib/Scrt1.o ../sysroot/aarch64-linux-ohos/usr/lib/crti.o /data/llvm/lib/clang/15.0.4/lib/aarch64-linux-ohos/clang_rt.crtbegin.o -L/data/llvm/lib/clang/15.0.4/lib/aarch64-linux-ohos -L../sysroot/aarch64-linux-ohos/usr/lib/ -L/data/llvm/bin/../lib/aarch64-linux-ohos/ /data/local/tmp/buffer-b81a57.o -lc++ -lc++abi -lunwind -lm /data/llvm/lib/clang/15.0.4/lib/aarch64-linux-ohos/libclang_rt.builtins.a -l:libunwind.a -lc /data/llvm/lib/clang/15.0.4/lib/aarch64-linux-ohos/libclang_rt.builtins.a -l:libunwind.a /data/llvm/lib/clang/15.0.4/lib/aarch64-linux-ohos/clang_rt.crtend.o ../sysroot/aarch64-linux-ohos/usr/lib/crtn.o
```
### Need to cherry-pick to release (eg：monthly_20221018, OpenHarmony-3.2-Beta5 ...) branch？

- [ ] yes，branch list:
- [x] no

why:

###  Compatibility impact assessment, please indicate (Y/N)

类型	指派人员	状态
审查	hhj Pavel Kosov 已审查通过	已完成 (1/1人)
测试	openharmony_ci 已测试通过	已完成 (1/1人)

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