[compiler-rt] [compiler-rt][test] Remove noisy warnings (PR #191510)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

> > > `find_compiler_libdir` => `get_path_from_clang` => uses `--target={config.target_triple}` when asking for the runtimes path. Shouldn't clang be returning the i386 path?
> > 
> > 
> > But this point is interesting
> 
> get_path_from_clang is always called target_triple --target=x86_64-unknown-linux-gnu

Actually it's called 

usr/local/google/home/vitalybuka/src/llvm.git/out/z/./bin/clang', '--target=x86_64-unknown-linux-gnu', '-m64', '-print-runtime-dir'

or

usr/local/google/home/vitalybuka/src/llvm.git/out/z/./bin/clang', '--target=x86_64-unknown-linux-gnu', '-m32', '-print-runtime-dir'

https://github.com/llvm/llvm-project/pull/191510