Add setup_libgpiod.sh setup_systools.sh

guowenxue

2021-01-08 2e9da8d42bd99ad46ce705e45f5c6e4488bd788d

tools/rpi_crosstool.tar.bz2 does not exist in tree 5cdd6993263af59f639a1031962e4d8cd00e5a10