loongson/pypi: links for serverhub-agent

loongson/mirror serverhub_agent-0.0.22.tar.gz
loongson/mirror serverhub_agent-0.0.21-1.tar.gz
loongson/mirror serverhub_agent-0.0.20.tar.gz
loongson/mirror serverhub_agent-0.0.19.tar.gz
loongson/mirror serverhub_agent-0.0.18.tar.gz