Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/@python2/fnmatch.pyi

@@ -0,0 +1,8 @@
+from typing import AnyStr, Iterable, List, Union
+
+_EitherStr = Union[str, unicode]
+
+def fnmatch(filename: _EitherStr, pattern: _EitherStr) -> bool: ...
+def fnmatchcase(filename: _EitherStr, pattern: _EitherStr) -> bool: ...
+def filter(names: Iterable[AnyStr], pattern: _EitherStr) -> List[AnyStr]: ...
+def translate(pattern: AnyStr) -> AnyStr: ...