apply_issue step hangs and the output is often in the reverse order. This CL is
to help diagnose the problem.

TBR=cmp@chromium.org
BUG=159868


Review URL: https://chromiumcodereview.appspot.com/11359093

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@166505 0039d316-1c4b-4281-b951-d872f2087c98