[llvm-branch-commits] [clang] release/20.x: [SystemZ] Add header guard macros to vecintrin.h (#129170) (PR #129286)

[via llvm-branch-commits]

github-actions[bot] wrote:

@uweigand (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix.  When you are done, please add the release:note label to this PR. 

https://github.com/llvm/llvm-project/pull/129286