manifest: Use clutter-1.16
manifest: Use clutter-1.16

chergert/gnome-continuous,GNOME/gnome-ostree,chergert/gnome-continuous,GNOME/gnome-ostree,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,vrutkovs/vrutkovs.github.io,GNOME/gnome-ostree