Make drive.py python3 compatible

[pirofti]

httplib is no longer available in python3 and has been renamed as http.client.

Here is a patch to fix that in GDriveFS.

$ cat patches/patch-lib_gdrivefs_drive_py 
$OpenBSD$

Index: lib/gdrivefs/drive.py
--- lib/gdrivefs/drive.py.orig
+++ lib/gdrivefs/drive.py
@@ -4,7 +4,7 @@ import dateutil.parser
 import random
 import json
 import time
-import httplib
+import http.client as httplib
 import ssl
 import tempfile
 import pprint