loongson/mirror: links for rfind

loongson/mirror rfind-0.4.0.tar.gz
loongson/mirror rfind-0.2.0.tar.gz
loongson/mirror rfind-0.2.0-py3-none-any.whl
loongson/mirror rfind-0.1.0.tar.gz
loongson/mirror rfind-0.1.0-py3-none-any.whl