[clang] [clang] Fix PointerAuth semantics of cpp_trivially_relocatable (PR #143969)

[Oliver Hunt via cfe-commits]

ojhunt wrote:

> LLVM Buildbot has detected a new failure on builder `ppc64le-flang-rhel-clang` running on `ppc64le-flang-rhel-test` while building `clang` at step 6 "test-build-unified-tree-check-flang".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/30880
> 
> Here is the relevant piece of the build log for the reference

I'm not convinced a change to trivial relocation in c++ is the cause of failure in a flang test?

https://github.com/llvm/llvm-project/pull/143969