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

[Paul T Robinson via llvm-commits]

pogo59 wrote:

@mstorsjo On reflection I agree that a build-time choice for handling this is not appropriate. It really wants to be target-based. Latest version (a) falls back to old style for Windows/PS as well as AIX, (b) adds a driver option to influence that default.

@MaskRay @tru @nico PTAL

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