[clang] [llvm] [TargetVerifier][AMDGPU] Add TargetVerifier. (PR #123609)

[Shilei Tian via llvm-commits]

================
@@ -0,0 +1,175 @@
+#include "llvm/Target/TargetVerify/AMDGPUTargetVerifier.h"
----------------
shiltian wrote:

This file doesn't have LLVM copyright header

https://github.com/llvm/llvm-project/pull/123609