add (overwrite with) mypy stubs, if available

stdlib/3/gettext.pyi

@@ -0,0 +1,39 @@
+# Stubs for gettext (Python 3.4)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from typing import Any
+
+class NullTranslations:
+    def __init__(self, fp=None): ...
+    def add_fallback(self, fallback): ...
+    def gettext(self, message): ...
+    def lgettext(self, message): ...
+    def ngettext(self, msgid1, msgid2, n): ...
+    def lngettext(self, msgid1, msgid2, n): ...
+    def info(self): ...
+    def charset(self): ...
+    def output_charset(self): ...
+    def set_output_charset(self, charset): ...
+    def install(self, names=None): ...
+
+class GNUTranslations(NullTranslations):
+    LE_MAGIC = ...  # type: Any
+    BE_MAGIC = ...  # type: Any
+    def lgettext(self, message): ...
+    def lngettext(self, msgid1, msgid2, n): ...
+    def gettext(self, message): ...
+    def ngettext(self, msgid1, msgid2, n): ...
+
+def find(domain, localedir=None, languages=None, all=False): ...
+def translation(domain, localedir=None, languages=None, class_=None, fallback=False,
+                codeset=None): ...
+def install(domain, localedir=None, codeset=None, names=None): ...
+def textdomain(domain=None): ...
+def bindtextdomain(domain, localedir=None): ...
+def dgettext(domain, message): ...
+def dngettext(domain, msgid1, msgid2, n): ...
+def gettext(message): ...
+def ngettext(msgid1, msgid2, n): ...
+
+Catalog = ...  # type: Any