Commit ffe5aac8 introduced new set of face images and removed the old
ones. Consequently, generic avatar is shown for people after update.
Add back legacy images, so people won't lose their current images on
update. Add them into the subfolder and create symlinks for them,
so it can be simply filtered out from the chooser widget, because just
the new images should be shown.
https://gitlab.gnome.org/GNOME/gnome-control-center/issues/5
6e4d75eaaf
