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

[David Tenty via llvm-commits]

https://github.com/daltenty approved this pull request.

LGTM (I'd generalize this more in a follow on though, there's no reason for this to be limited to LoP)

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