Fast-forward version number on bleeding_edge to 3.22.0

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/24235009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16886 ce2b1a6d-e550-0410-aec6-3dcde31c8c00