Bump buildroot to 2019.02

bsp/buildroot/board/freescale/common/imx/imx8-bootloader-prepare.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+main ()
+{
+	UBOOT_DTB=$2
+	if [ ! -e "$UBOOT_DTB" ]; then
+		echo "ERROR: couldn't find dtb: $UBOOT_DTB"
+		exit 1
+	fi
+	cat ${BINARIES_DIR}/u-boot-spl.bin ${BINARIES_DIR}/lpddr4_pmu_train_fw.bin > ${BINARIES_DIR}/u-boot-spl-ddr.bin
+	BL31=${BINARIES_DIR}/bl31.bin BL33=${BINARIES_DIR}/u-boot.bin ${HOST_DIR}/bin/mkimage_fit_atf.sh ${UBOOT_DTB} > ${BINARIES_DIR}/u-boot.its
+	${HOST_DIR}/bin/mkimage -E -p 0x3000 -f ${BINARIES_DIR}/u-boot.its ${BINARIES_DIR}/u-boot.itb
+	rm -f ${BINARIES_DIR}/u-boot.its
+
+	${HOST_DIR}/bin/mkimage_imx8 -fit -signed_hdmi ${BINARIES_DIR}/signed_hdmi_imx8m.bin -loader ${BINARIES_DIR}/u-boot-spl-ddr.bin 0x7E1000 -second_loader ${BINARIES_DIR}/u-boot.itb 0x40200000 0x60000 -out ${BINARIES_DIR}/imx8-boot-sd.bin
+
+	exit $?
+}
+
+main $@