How to install android-tools:

method 1:
	download source and compile：
	https://launchpad.net/ubuntu/+archive/primary/+files/android-tools_4.2.2+git20130218.orig.tar.xz
	https://launchpad.net/ubuntu/+archive/primary/+files/android-tools_4.2.2+git20130218-3ubuntu41.debian.tar.gz
	depend on zlib
	http://www.zlib.net/zlib-1.2.11.tar.xz
	depend on openssl
	https://www.openssl.org/source/openssl-1.1.1h.tar.gz

method 2:
    download buildroot and build： https://github.com/rockchip-linux/buildroot