[googledrive] Add new extractor

youtube_dl/extractor/__init__.py

@@ -209,6 +209,7 @@ from .globo import GloboIE
 from .godtube import GodTubeIE
 from .goldenmoustache import GoldenMoustacheIE
 from .golem import GolemIE
+from .googledrive import GoogleDriveIE
 from .googleplus import GooglePlusIE
 from .googlesearch import GoogleSearchIE
 from .gorillavid import GorillaVidIE