Revert "Try with no su"

This reverts commit 411e3834e5864aa880473384dad94b4d2d974271.

src/freedombone-image-customise

 		if [ ${#CONFIG_FILENAME} -gt 2 ]; then
 			cp $CONFIG_FILENAME $rootdir/root/$PROJECT_NAME.cfg
 			cat $rootdir/root/$PROJECT_NAME.cfg
-			chroot "$rootdir" $PROJECT_NAME -c /root/$PROJECT_NAME.cfg
+			chroot "$rootdir" su -c "$PROJECT_NAME -c /root/$PROJECT_NAME.cfg" - root
 		fi
 	fi
 }