Add __new__ to time.struct_time (#1394)

This is needed because otherwise pytype uses the `__new__` inherited from the `NamedTuple` base class.

Author: rchen152

stdlib/2/time.pyi

@@ -17,6 +17,9 @@ class struct_time(NamedTuple('_struct_time',
     def __init__(self, o: Tuple[int, int, int,
                                 int, int, int,
                                 int, int, int], _arg: Any = ...) -> None: ...
+    def __new__(cls, o: Tuple[int, int, int,
+                              int, int, int,
+                              int, int, int], _arg: Any = ...) -> struct_time: ...
 
 _TIME_TUPLE = Tuple[int, int, int, int, int, int, int, int, int]
 

stdlib/3/time.pyi

@@ -45,6 +45,15 @@ if sys.version_info >= (3, 3):
             ],
             _arg: Any = ...,
         ) -> None: ...
+        def __new__(
+            cls,
+            o: Union[
+                Tuple[int, int, int, int, int, int, int, int, int],
+                Tuple[int, int, int, int, int, int, int, int, int, str],
+                Tuple[int, int, int, int, int, int, int, int, int, str, int]
+            ],
+            _arg: Any = ...,
+        ) -> struct_time: ...
 else:
     class struct_time(
         NamedTuple(
@@ -55,6 +64,7 @@ else:
         )
     ):
         def __init__(self, o: TimeTuple, _arg: Any = ...) -> None: ...
+        def __new__(cls, o: TimeTuple, _arg: Any = ...) -> struct_time: ...
 
 
 # ----- functions -----