[clang] [llvm] [PowerPC][AIX] Support #pragma comment copyright for AIX (PR #178184)

[Tony Varghese via cfe-commits]

tonykuttai wrote:

The current test documentation failure is due to [[AMDGPU] Track tensor load/store DMAs with asyncmark](https://github.com/llvm/llvm-project/pull/200775#top)

https://github.com/llvm/llvm-project/pull/178184