We can not have sysmocom-backup-default and sysmocom-backup-data-default
installed at the same time. I don't want to play games with RREPLACE and
RPROVIDES either. So simply use one of the two files. Copy the two more
default values over to the other recipe.
When using squashfs + overlayfs a root, we need to store the backup
somewhere else and restore it on every boot. Do avoid breaking existing
users, this is implemented in a separate recipe (as suggested by Holger).