Add tsl2561 code, and test force fill-in light ok

guowenxue

2019-07-31 55f465be474c54edbceb3c6013ae629e0e0323d8

tools/rpi_crosstool.tar.bz2 does not exist in tree fe0c2710ef4f6e3b48711d741948d6199c9d7298