Add lightd code, auto light can work by infrared and relay now

guowenxue

2021-01-23 8fee9f5701ffdcc17e1f0f2453d495fe849d1fe2

tools/rpi_crosstool.tar.bz2 does not exist in tree 89acb6b502dbcaf40b578b43ee2b9a6b6520bf93