[llvm-branch-commits] [clang] release/20.x: [Clang][ReleaseNotes] Document -fclang-abi-compat=19 re: #110503 (PR #125368)

[Tom Stellard via llvm-branch-commits]

tstellar wrote:

Sorry, I didn't realize a review was requested on this.  I usually merge release notes patches right away.  I'll keep this in -rc1 and any follow up changes can be made for -rc2.

https://github.com/llvm/llvm-project/pull/125368