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

[Daniel Chen via llvm-commits]

DanielCChen wrote:

> LGTM.
> 
> It would be safer/clearer to make the `IsFortran` argument change a separate PR...

Good point. I could have made another PR to set `flang-rt` library name only. Will keep that in mind.

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