Revert "runit: changed to not install sysvinit's system script"

This reverts commit e1cb5e4563.
It is a hack but atm we don't have a better/cleaner alternative.

base/runit/runit.conf

@@ -79,6 +79,12 @@ EOT
 		ln -snfv $sysconfdir/getty-$i $pkg_djb_servicedir/
 	done
 
+	# HACK, runit need it's own system initializer
+	install_init system $confdir/../sysvinit/system.init
+
+	ln -snfv /etc/rc.d/init.d/system "$root/$sysconfdir/1.d/01system"
+	ln -snfv /etc/rc.d/init.d/system "$root/$sysconfdir/3.d/99system"
+
 	# init at /sbin
 	if [ ${pkg_djb_commanddir} != $root$sbindir ]; then
 		echo "Copying init files to /sbin..."