[llvm] [Offload] Change HSA header search order (PR #95769)

[Shilei Tian via llvm-commits]

shiltian wrote:

I'm actually not sure why the order makes a difference here? Is the issue caused by existence of `include/hsa/hsa.h` and `include/hsa.h` and they are actually different versions?

https://github.com/llvm/llvm-project/pull/95769