[clang] [llvm] Build release binaries for multiple targets (PR #98431)

[Tom Stellard via llvm-commits]

tstellar wrote:

Only 2 (linux x86 and macOS AArch64) of the 4 configurations are passing currently, but I still think it makes sense to merge this so we can start building binaries for 19.1.0-rc1.   I can work on fixing the other configurations in a follow up patch.

https://github.com/llvm/llvm-project/pull/98431