remove submodule allwinner-tools, sunxi-boards
add pcduino.fex
update submodule
add allwinner-tools, from linux-sunxi/allwinner-tools.git 820a5065c69196e7db8e343c4249fbfc4cf2928f
livesuit:make nand partition compatible with old version
build livesuit image by default
add patch support, apply patch before compile
strip kernel modules for hwpack
bug fix for apply_patch.sh
add kernel patch (rootfs & config)