Fix clusterfuzz check in auto-roll.

Minor fixes: Strip new lines from api key. Missing import. Use string query parameters.

BUG=
TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/353813002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21998 ce2b1a6d-e550-0410-aec6-3dcde31c8c00