Update checked in version of gsutil to version 4.6

gslib/addlhelp/__init__.py

Index: gslib/addlhelp/__init__.py
===================================================================
--- gslib/addlhelp/__init__.py	(revision 33376)
+++ gslib/addlhelp/__init__.py	(working copy)
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Copyright 2012 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -11,5 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+"""Package marker file."""
 
-"""Package marker file."""
+from __future__ import absolute_import