GTTF: Retry on flaky SSL "EOF occurred in violation of protocol" errors.

BUG=none

Review URL: https://codereview.chromium.org/26913003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@227982 0039d316-1c4b-4281-b951-d872f2087c98

rietveld.py

@@ -385,7 +385,8 @@ class Rietveld(object):
         except urllib2.URLError, e:
           if retry >= (maxtries - 1):
             raise
-          if not 'Name or service not known' in e.reason:
+          if (not 'Name or service not known' in e.reason and
+              not 'EOF occurred in violation of protocol' in e.reason):
             # Usually internal GAE flakiness.
             raise
         # If reaching this line, loop again. Uses a small backoff.