update tsl2561 code, update delay time to 400ms

Guo Wenxue

2019-07-05 6d7b28e6a7836988247c188f4284861fe33410ae

tools/rpi_crosstool.tar.bz2 does not exist in tree 944ed8f52186a6732b954b9d7ede823c43c464e9