[lld] wasm-ld: Implement function pointer alignment (PR #105532)

[Ethan O'Brien via llvm-commits]

ethanaobrien wrote:

Thanks! This has been added, and is now ready for review.

Should this option also be added as an emscripten option? It seems it already was once upon a time. https://github.com/emscripten-core/emscripten/blob/b94d6e6ced33576a1ad96c7f6e701788c6f49211/src/settings.js#L2209C5-L2209C31

https://github.com/llvm/llvm-project/pull/105532