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

[Paul T Robinson via cfe-commits]

pogo59 wrote:

>  For my toolchain I can continue to carry a patch until this is all sorted.

Same here; I'm just professionally offended by the brokenness. But I'm not the right person to drive an RFC. If nobody else is willing to, I'll abandon this and we'll do what we need to downstream to hack around it.

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