[clang] Fix SemaCXX/msvc-pragma-function-no-builtin-attr.cpp test (PR #119873)

[Paul Osmialowski via cfe-commits]

pawosm-arm wrote:

> This should fix https://lab.llvm.org/buildbot/#/builders/190/builds/11300
> 
> I am compiling clang locally to verify that there would be no other problems with the test on macOS.
> 
> > I suppose this is the reason check-clang fails today.
> 
> Are there other test failures related to [84b0f01](https://github.com/llvm/llvm-project/commit/84b0f0145887bbfe49fd4dc85490b14108a72cee) ?

I'm seeing this:

https://github.com/llvm/llvm-project/pull/119873