[clang] Multilib support for libraries with exceptions (PR #75031)

[Michael Platings via cfe-commits]

mplatings wrote:

> I'm not actively working on LLVM any more so I'm going to remove myself as reviewer now.

Or at least I would if GitHub would let me! https://github.com/orgs/community/discussions/23054

https://github.com/llvm/llvm-project/pull/75031