[llvm] [WebAssembly] Define `__funcref_call_table` in generated asm and objects (PR #180900)

[Demetrius Kanios via llvm-commits]

QuantumSegfault wrote:

> Sorry, in case you didn't see I already approved this change assuming you add a comment and/or TODO.
> 
> Since this is basically just how things work today, it seems reasonable to make this small fix, and potentially bigger/better fixes later.

I mean, considering that this has been broken all these years, I doubt anyone is using it right now.

Might be able to do away with the workaround entirely?

But that aside, I've added the comments you requested. Does it look okay now?

https://github.com/llvm/llvm-project/pull/180900