[compiler-rt] [compiler-rt][MSVC] Conditionally remove emupac.cpp for msvc (PR #149823)

[Zack Johnson via llvm-commits]

zacklj89 wrote:

@nico thanks, I didn't know they shared that evaluation here!

clang-cl uses the MSVC-style inline assembly syntax, I think (?), so this should also apply for it as well.

https://github.com/llvm/llvm-project/pull/149823