[clang] [Clang] Make '-Wglobal-constructors` work on the GNU attributes (PR #129917)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Thanks! You should also add a release note to `clang/docs/ReleaseNotes.rst` so users know about the change.

https://github.com/llvm/llvm-project/pull/129917