put locals() into builtin stubs

Author: ecprice

stubs/2.7/builtins.pyi

@@ -843,6 +843,7 @@ def __import__(name: unicode,
                fromlist: List[str] = ..., level: int = ...) -> Any: ...
 
 def globals() -> Dict[str, Any]: ...
+def locals() -> Dict[str, Any]: ...
 
 # TODO: buffer support is incomplete; e.g. some_string.startswith(some_buffer) doesn't type check.
 AnyBuffer = TypeVar('AnyBuffer', str, unicode, bytearray, buffer)