on http://codereview.appspot.com/6221063/ which makes sure that rietveld will
upload non-image binary files.

BUG=23608
TEST=Use apply_issue.py with an issue that contains binary files, and make
sure the files download correctly.

Review URL: https://chromiumcodereview.appspot.com/10422006

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@138472 0039d316-1c4b-4281-b951-d872f2087c98