[llvm] Fix warnings while building llvm against emscripten for web assembly (PR #118262)

[Anutosh Bhat via llvm-commits]

anutosh491 wrote:

Emscripten doesn't yet support dynamic linking as per what cmake expects so we can't build and use `SHARED` libraries in the normal way as mentioned by @sbc100 's comment here (https://github.com/emscripten-core/emscripten/issues/17804#issuecomment-1238250992)

Hence we could maybe having this instead to resolve the numerous warnings that show up while building llvm against emscripten.



https://github.com/llvm/llvm-project/pull/118262