Get rid of the 'No output!' generated by swarm.
Get rid of the 'No output!' generated by swarm.

The fix is to output a white line.

R=csharp@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/19813003

git-svn-id: d5a9b8648c52d490875de6588c8ee7ca688f9ed1@212588 0039d316-1c4b-4281-b951-d872f2087c98

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py