Bug 8921: make koha-common*.deb depend on cron-daemon

Bug 8921: make koha-common*.deb depend on cron-daemon

Trivial patch to add 'cron-daemon' as dependency for the koha-common
package. 'cron' is usually pulled in any minimal Ubuntu/Debian
install, but in some circumstances (using debootstrap) it might be
absent.

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
No entry in debian/control yet, but
according to comments in the file this file is generated
from control.in - so this should be ok.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>