[clang] [flang-rt] Pass the whole path of libflang_rt.runtime.a to linker on AIX (PR #131041)

[Michael Kruse via cfe-commits]

https://github.com/Meinersbur commented:

This is what I  would like to do more generally, not just for AIX. This PR however will break using a shared library libflang_rt.runtime.so. Ideally, we would synchronize with the compiler-rt implementation which already has many supporting functions such as `buildCompilerRTBasename`.

https://github.com/llvm/llvm-project/pull/131041