[clang] [Clang][AMDGPU] Enable `avail-extern-to-local` for ThinLTO in HIP (PR #134476)

[Shilei Tian via cfe-commits]

shiltian wrote:

Hmm, the failure is weird. I can't reproduce it locally. Change it to something else and hopefully this can "resolve" the issue.

https://github.com/llvm/llvm-project/pull/134476