"uptodate" is a possible image update phase as well.
If laptop/host has booted from some other image than default, and
ltspimage update is started, make sure that the currently set image is
set as default.  The update script does only support the case that the
update starts from the default image (and removes others for space),
and if the default image is broken (and that is probably the backup image
has been in use), the system is hosed (well, in most cases but there is
a possibility for a successful update actually), unless we do this.
A bit magical, but probably a sensible thing to do.
Do not hardcode /images.