[clang] [llvm] [Clang][AIX] Add -mloadtime-comment-vars flag to preserve identifying variables (PR #187986)

[Tony Varghese via llvm-commits]

tonykuttai wrote:

> https://github.com/llvm/llvm-project/pull/187986#discussion_r4189119568

Done in the latest push. The storage-duration and list-parsing scenarios are moved to `loadtime-comment-vars.c`, and this file now contains only the single mangled-name matching run with the C++-specific forms.

https://github.com/llvm/llvm-project/pull/187986