Added <template> after </body> test to html5lib

R=abarth@chromium.org, abarth
BUG=

Review URL: https://codereview.chromium.org/25800002

git-svn-id: svn://svn.chromium.org/blink/trunk@158756 bbb929c8-8fbe-4397-9dbb-9b2b20218538