Add convenient copy_upgrade.sh script

Generates upgrade scripts and copies to a mount path as well as
renaming the u-boot binary properly.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>

copy_upgrade.sh

+#!/bin/sh
+
+if [ $# -lt 1 ]; then
+	echo "Error, missing a parameter:"
+	echo "$0 <mount_path>"
+	exit 1
+fi
+
+./tools/mkimage -A arm -O linux -T script -C none \
+	-a 0 -e 0 -n "update script" \
+	-d board/boundary/nitrogen6x/6x_upgrade.txt 6x_upgrade
+
+./tools/mkimage -A arm -O linux -T script -C none \
+	-a 0 -e 0 -n "update script" \
+	-d board/boundary/bootscripts/upgrade.txt upgrade.scr
+
+uboot_defconfig=`grep CONFIG_DEFCONFIG include/config.h|sed -e 's/#define CONFIG_DEFCONFIG[^"]\{1,\}"\([^"]\{1,\}\)"/\1/'`
+
+cp u-boot.imx u-boot.$uboot_defconfig
+mv -v -t $1/ u-boot.$uboot_defconfig 6x_upgrade upgrade.scr