[llvm] [llvm-install-name-tool] Error on non-Mach-O binaries (PR #90351)

[James Henderson via llvm-commits]

https://github.com/jh7370 requested changes to this pull request.

Pre-merge checks are failing on Windows. I don't immediately see the issue though :/

https://github.com/llvm/llvm-project/pull/90351