ubox: fix typo that caused log_file to not be validated properly

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38906 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/system/ubox/files/log.init

@@ -11,7 +11,7 @@ PROG=/sbin/logread
 validate_log_section()
 {
 	uci_validate_section system system "${1}" \
-		'Password:string' \
+		'log_file:string' \
 		'log_size:uinteger' \
 		'log_ip:ipaddr' \
 		'log_port:port:514' \