[clang] clang: Add BoundArch argument to addClangTargetOptions (PR #196504)

[Matt Arsenault via cfe-commits]

arsenm wrote:

> It's really only used for weird binding rules in fat binary contexts. I.e. +xnack can link to a gfx942 or something. Unfortunately this goes all the way into the HSA runtime I believe.

Yes, but not directly. The backend sees these as split anyway, the backend doesn't need to parse target IDs


https://github.com/llvm/llvm-project/pull/196504