[clang] [CMake][Release] Use llvm-bitcode-strip on Darwin for build with -ffat-lto-objects (PR #200764)

[Cullen Rhodes via cfe-commits]

c-rhodes wrote:

> long term it would be neat if llvm-strip could handle both of these instead of having to select the "correct" version of the strip command?

I wondered the same and found it came up in https://discourse.llvm.org/t/rfc-contributing-bitcode-strip/56245 but apparently the argument semantics are different enough to warrant independent tools 

https://github.com/llvm/llvm-project/pull/200764