[clang] [Driver] Add support for GCC installation detection in Baremetal toolchain (PR #121829)

[Sam Elliott via cfe-commits]

lenary wrote:

Nice, I can navigate that UI.

Looks like a similar thing that I fixed-forward, but this time with a different unwind library, but clang isn't very happy with mixing unwind libraries anyway.

I think I'll leave this to @quic-garvgupt to fix, using the info from your link.

https://github.com/llvm/llvm-project/pull/121829