OpenWrt 源码获取

// trunk | lastest:
git clone git://github.com/openwrt/openwrt.git

// chaos_calmer | v15.05:
git clone -b chaos_calmer git://github.com/openwrt/openwrt.git 

// Barrier Breaker | v 14.07
git clone -b barrier_breaker git://github.com/openwrt/openwrt.git

// Attitude Adjustment | v12.09
git clone -b attitude_adjustment git://github.com/openwrt/openwrt.git
git clone git://git.openwrt.org/12.09/packages.git