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

[via cfe-commits]

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@@ -6510,6 +6510,98 @@ When `#pragma comment(copyright, ...)` appears in a C++20 module interface
 unit, the copyright string is embedded only in the object file compiled from
 that interface unit. Importing TUs do not re-emit the string.
 
+### Preserving Identifying Variables with -mloadtime-comment-vars
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midhuncodes7 wrote:

This update is in LanguageExtensions.md
I wanted to check if `clang/docs/ReleaseNotes.rst` needs update?

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