[llvm] [X86] Do not end 'note.gnu.property' section with -fcf-protection (PR #79360)

[Fangrui Song via llvm-commits]

https://github.com/MaskRay approved this pull request.

Thanks for the patch. LGTM. I think a better place for the test is `llvm/test/CodeGen/X86/note-cet-property-*.ll`

The problem is that codegen should not end the section, not on the MCAsmParser  side.

https://github.com/llvm/llvm-project/pull/79360