Usage:
sudo ./write_all.sh /dev/sdx brpy/minX/xxx
brpy/minX/xxx is the name of rootfs, put them in ../rootfs_build
And name them like "rootfs-xxx-tar.gz"
Scripts can be used sepratedly like:
sudo ./write_p2.sh /dev/sdx brpy
sudo ./clear_partion.sh /dev/sdx