[compiler-rt] Implement hdc testing support for ohos · Pull Request !345 · OpenHarmony/third_party_llvm-project

### Issue
https://gitee.com/openharmony/third_party_llvm-project/issues/I8PGWS?from=project-issue

### Reason (Purpose, Solved Problem)
This PR adds testing support for compiler-rt on OHOS devices with hdc.  
Please, note following:
1. This patch was tested with hwasan, but should work with scudo/gwp-asan as well, but failures expected.
2. You have to setup environment variables for remote device:  
   `HDC_UTID` to the serial number of your OHOS device  
   `HDC_SERVER_IP_PORT` to the remote hdc server IP and port in format 'IP:PORT'  
3. You may setup other environment variables:         
   `HDC` - path to the custom hdc binary, otherwise `hdc` should be on your PATH  
   `OHOS_REMOTE_TMP_DIR` - path on the device, where the tests will be executed (/data/local/tmp/Output by default). 
   `LLVM_SYMBOLIZER_PATH` - path to llvm-symbolizer ON THE DEVICE, by default it is `OHOS_REMOTE_TMP_DIR/llvm-symbolizer-aarch64`, if it is not set - make sure `llvm-symbolizer` binary is on the PATH on the remote device.  
4. If your tests requires additional libraries to run, e.g. shared libc++ or shared sanitizers, you have to push it to the OHOS_REMOTE_TMP_DIR directory on the device manually before starting tests.  
5. You can set `DCOMPILER_RT_TEST_COMPILER_CFLAGS` cmake flag with additional flags you need for your remote device binaries.  
   e.g. `-DCOMPILER_RT_TEST_COMPILER_CFLAGS="--target=... --sysroot=... -fno-emulated-tls ..."`

### Description

A clear and concise description of changes, design etc. Provide a link to external references / discussion if appropriate

Development Guidelines: https://gitee.com/openharmony/third_party_llvm-project/blob/master/OpenHarmonyDevelopmentGuidelines.md

### Test (Local test)

### Need to cherry-pick to release (eg：monthly_20221018, OpenHarmony-3.2-Beta5 ...) branch？

- [ ] yes，branch list:
- [x] no

why:

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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