loongson/mirror: links for arvados-tools

loongson/mirror arvados_tools-3.2.1b2.tar.gz
loongson/mirror arvados_tools-3.2.1b2-py3-none-any.whl
loongson/mirror arvados_tools-3.2.1b1.tar.gz
loongson/mirror arvados_tools-3.2.1b1-py3-none-any.whl