[clang] [Driver] Restore compiler-rt arch suffix for PS and Windows (PR #89775)

[Paul T Robinson via cfe-commits]

pogo59 wrote:

> what gets emitted as embedded directive, when the compiler doesn't see either of them at compile time (with e.g. distributed build systems), while they might be available at link time.

This is exactly the scenario we had. I will double-check that it is solved by my patch, but it may take a little while.

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