[clang] [llvm] [Driver] Add option to select compiler-rt arch suffix (PR #89775)

[Tobias Hieta via cfe-commits]

tru wrote:

I think this is fine. I probably have to carry a one line patch in our tree to make it the default on windows as well. But that's acceptable to me. 

https://github.com/llvm/llvm-project/pull/89775