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

[Shilei Tian via llvm-commits]

shiltian wrote:

I think this sounds very hacky. Does it work if we do `target_include_directories(BEFORE omptarget.rtl.amdgpu PRIVATE dynamic_hsa)`? This will make sure that the `dyanic_hsa` will be the first one to be listed in `-I`.

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