Added stdlib/2.7/getopt.pyi, updated 3/getopt.pyi (#221)

* Added stdlib/2.7/getopt.pyi

* Small fixes to stdlib/3/getopt.pyi

stdlib/2.7/getopt.pyi

@@ -0,0 +1,17 @@
+from typing import List, Tuple
+
+class GetoptError(Exception):
+    opt = ... # type: str
+    msg = ... # type: str
+    def __init__(self, msg: str, opt: str=...) -> None: ...
+    def __str__(self) -> str: ...
+
+error = GetoptError
+
+def getopt(args: List[str], shortopts: str,
+           longopts: List[str]=...) -> Tuple[List[Tuple[str, str]],
+                                             List[str]]: ...
+
+def gnu_getopt(args: List[str], shortopts: str,
+           longopts: List[str]=...) -> Tuple[List[Tuple[str,str]],
+                                             List[str]]: ...

stdlib/3/getopt.pyi

@@ -5,12 +5,12 @@
 from typing import List, Tuple
 
 def getopt(args: List[str], shortopts: str,
-           longopts: List[str]) -> Tuple[List[Tuple[str, str]],
-                                         List[str]]: ...
+           longopts: List[str]=...) -> Tuple[List[Tuple[str, str]],
+                                             List[str]]: ...
 
 def gnu_getopt(args: List[str], shortopts: str,
-               longopts: List[str]) -> Tuple[List[Tuple[str, str]],
-                                             List[str]]: ...
+               longopts: List[str]=...) -> Tuple[List[Tuple[str, str]],
+                                                 List[str]]: ...
 
 class GetoptError(Exception):
     msg = ...  # type: str