swift234

Fix static member functions so a member of type T has type "metatype<T> -> () -> ()" instead of "() -> ()".
This is much more convenient for IRGen, and gives us a reasonable representation for a static
polymorphic function on a polymorphic type.

I had to hack up irgen::emitArrayInjectionCall a bit to make the rest of this patch work; John, please
revert those bits once emitCallee is fixed.



Swift SVN r2488