[libc-commits] [libc] [libc][cmake] pass -mthumb for thumb triples (PR #96550)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

Ok, I can change Android's bp file to use `-marm` (perhaps worth benchmarking, but "eh 32b bit").

Orthogonal to that, I would like to:
1. be able to test `-mthumb` builds of llvm-libc
2. using the runtimes build

This cmake change enables simplicity of testing llvm-libc, so I think it stands on its own merit.  Unless @petrhosek knows of a better way to do this?

https://github.com/llvm/llvm-project/pull/96550