[llvm] [LLVM] Fix llvm-gpu-loader use in standalone (PR #132664)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

I'm unsure, my gut feeling is that we shouldn't need to carry changes in LLVM just to make an external user's tree easier to use when there's an existing way to work around it. @nikic WDYT?

https://github.com/llvm/llvm-project/pull/132664