update uboot patch to add boot command

guowenxue

2021-11-16 22a5a94a297df6ccf79f2864824ef49a219caa8b

 bsp/bootloader/build.sh

@@ -95,6 +95,7 @@

    mkdir -p ${IMG_PATH}
    cp ${IMG_NAME} ${IMG_PATH}
    cp ${IMG_NAME} /tftp

    cd ${PRJ_PATH}
}