loongson/pypi: links for salt

INFO: Because this project isn't in the mirror_whitelist, no releases from root/pypi are included.

loongson/pypi salt-3005.tar.gz
loongson/pypi salt-3005-py3-none-any.whl
loongson/pypi salt-2018.3.0-py3-none-any.whl
loongson/pypi salt-2018.3.0-py2-none-any.whl