exit function takes argument of any type. (#1116)

The type annotations for exit were incorrectly limited to int in two places; the others that I looked at are already correct.

Author: gwk

stdlib/2/__builtin__.pyi

@@ -713,7 +713,7 @@ def dir(o: object = ...) -> List[str]: ...
 def divmod(a: int, b: int) -> Tuple[int, int]: ...
 @overload
 def divmod(a: float, b: float) -> Tuple[float, float]: ...
-def exit(code: int = ...) -> NoReturn: ...
+def exit(code: Any = ...) -> NoReturn: ...
 @overload
 def filter(function: Callable[[_T], Any],
            iterable: Iterable[_T]) -> List[_T]: ...

stdlib/3/builtins.pyi

@@ -772,7 +772,7 @@ def eval(source: str, globals: Dict[str, Any] = None,
          locals: Mapping[str, Any] = None) -> Any: ...  # TODO code object as source
 def exec(object: str, globals: Dict[str, Any] = None,
          locals: Mapping[str, Any] = None) -> Any: ...  # TODO code object as source
-def exit(code: int = None) -> NoReturn: ...
+def exit(code: Any = ...) -> NoReturn: ...
 @overload
 def filter(function: Callable[[_T], Any], iterable: Iterable[_T]) -> Iterator[_T]: ...
 @overload