swift234

Check operator declaration binding in the first pass for FuncDecls.

This eliminates the pre-pass we were performing to bind the operator
decls, which was only a pre-pass because we used to bind unresolved
declaration references too early. In the process, fixed some bugs
(e.g., it wasn't checking methods at all) and improved the QoI with
Fix-Its and notes:

t.swift:2:6: error: prefix unary operator missing 'prefix' attribute
func ~~~(x : Float) {}
     ^
     [prefix] 
t.swift:1:17: note: prefix operator found here
operator prefix ~~~ {}
                ^



Swift SVN r7099