[cookies] Bind nsICookieManager2
[cookies] Bind nsICookieManager2

Finish binding nsICookieManager2. Again, compiles but isn't tested (also
note that the initialisation code isn't there, so this won't break
anything just yet).

clutter-project/clutter-mozembed,clutter-project/clutter-mozembed,clutter-project/clutter-mozembed