generate AArch64 llvm bindings

[John-Colvin]

Needed for apple silicon support

[deadalnix]

The right way to do this would be to use the llvm/Config/Targets.def file in llvm's include.

[deadalnix]

I'm just going to merge this even if it is wrong, but please keep them in alphabetical order, so it's easy to modify the list later on.

[John-Colvin]

I don't know, but I would guess your original suggestion is a good idea but it's a separate refactor for another day.

please keep them in alphabetical order, so it's easy to modify the list later on.

done