Bug 1559975 - Make configure.py lint with 'py2' and 'py3' r=catlee

Depends on D36090

Differential Revision: https://phabricator.services.mozilla.com/D36091

configure.py

@@ -2,7 +2,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-from __future__ import print_function, unicode_literals
+from __future__ import absolute_import, print_function, unicode_literals
 
 import codecs
 import itertools

tools/lint/py2.yml

@@ -6,7 +6,6 @@ py2:
         - build
         - client.py
         - config
-        - configure.py
         - dom
         - editor
         - gfx