overlay-files: Fix rc.local output display during boot

[gtxaspec]

Small change, changed printf to echo in S99rc.local to ensure correct output on the system console during boot.

[viktorxda]

Also please add some stop function stub, otherwise you get the usage message on every reboot:

root@openipc-ssc337de:~# reboot
root@openipc-ssc337de:~# Usage: /etc/init.d/S99rc.local {start|restart|reload}
Stopping majestic: OK

[gtxaspec]

updated with stop case statement