a13-olinuxino: Various improvements from olimex Debian images fex file

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
a13-olinuxino-lcd7: New fex for a13-olinuxino with olimex mod-lcd7-ts

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
a13-olinuxino-lcd10: New fex for a13-olinuxino with olimex mod-lcd10-ts

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
a20-olinuxino_micro-lcd7: New fex for a20-olinuxino-micro with olimex mod-lcd7-ts

Signed-off-by: Hans de Goede <hdegoede@redhat.com>