lint: update support for pylint-1.x

This doesn't fix the new warnings, but makes `cros lint` work.

BUG=chromium:431514
TEST=`cros lint <files>` no longer crashes
TEST=`cros/commands/lint_unittest.py` passes

Change-Id: I908abd03027cfc348ed3e74454d9cc0e556ca29d
Reviewed-on: https://chromium-review.googlesource.com/228721
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/pushimage.py b/scripts/pushimage.py
index bf4ee69..f904f4d 100644
--- a/scripts/pushimage.py
+++ b/scripts/pushimage.py
@@ -8,6 +8,8 @@
 artifacts for signing (which a signing process will look for).
 """
 
+# pylint: disable=bad-whitespace
+
 from __future__ import print_function
 
 import ConfigParser