Bug 1559975 - fix python2 linter errors for js/xpconnect r=ahal

Differential Revision: https://phabricator.services.mozilla.com/D38135

--HG--
extra : moz-landing-system : lando

js/xpconnect/loader/script_cache.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+
+from __future__ import absolute_import, print_function
+
 import io
 import os
 import struct

js/xpconnect/tests/marionette/test_loader_global_sharing.py

@@ -1,4 +1,4 @@
-from __future__ import print_function
+from __future__ import absolute_import, print_function
 
 from marionette_harness import MarionetteTestCase
 

tools/lint/py2.yml

@@ -10,7 +10,6 @@ py2:
         - gfx
         - ipc
         - js/src
-        - js/xpconnect
         - layout
         - modules
         - mozglue