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

[Ethan O'Brien via llvm-commits]

ethanaobrien wrote:

@sbc100 - I do want to try and finally get this finished and merged, though I don't know where to go. Things like writing to a file/stdout seem to be completely broken when changing the alignment of the first function and I don't know why or enough of this program to debug why. The small code snippet you shared involving no io works fine, though io seems completely broken. What's your opinion on this? Would always aligning at index 0 be an issue? I'm not sure what to do from here

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