Remove deletion of rpi-update (#359)
Remove deletion of rpi-update (#359)

* Re-add rpi-update to basic packages

Signed-off-by: Thomas Dietrich <5bc514dcdfd587e87028cb13798cd3a1db5728cd@tu-ilmenau.de> (github: ThomDietrich)

* Update system.sh

Signed-off-by: Thomas Dietrich <5bc514dcdfd587e87028cb13798cd3a1db5728cd@tu-ilmenau.de> (github: ThomDietrich)
openhab/openhabian,ThomDietrich/openhabian,openhab/openhabian,openhab/openhabian