MA-9611 [Android]: add license for utils

Add licese for utils.c

Change-Id: I6dc6de5d29542c587a809a719831793fc652bca6
Signed-off-by: zhang sanshan <sanshan.zhang@nxp.com>

lib/avb/fsl/utils.c

+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017 NXP
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
 
 #include <common.h>
 #include <stdlib.h>