Specify clang exe path in Driver Creation

[littlewu2508]

By doing so, TheDriver can get the correct resource dir.

Closes: #48
Reference: #49

[littlewu2508]

I believe this is the ultimate fix for #48, and its related issue #49.

https://github.com/RadeonOpenCompute/ROCm-CompilerSupport/blob/846cd67177bcf91dbbb941d525fff99d04364a0b/lib/comgr/src/comgr-compiler.cpp#L1021-L1024

Manually specifying ClangIncludePath is not needed if the driver is created with the correct clang binary path as first argument. In #48 it can be seen that clang driver can add the correct -resource-dir and -internal-isystem itself.

[littlewu2508]

With this patch, compile_hip_test_in_process passed on Gentoo, and if I changed clang version from 15.0.1 to 15.0.3 the tests can also pass without recompiling libamd_comgr.so.

[lamb-j]

Merged here ROCm/llvm-project@6eb9d12

Thanks for bringing this up!