Release 0.22.1
packagekit-glib2: Update to 0.8.12

(cherry picked from commit c4cf04404e3e096c06461b88d2924bcdb3fc224c)
vapi: Install packagekit-glib2 bindings

(cherry picked from commit 1ce8b8f4d433f1740adfabc7b19558c2a8cdc4fa)