loongson/mirror: links for mirrorx

loongson/mirror MirrorX-6.0.13.tar.gz
loongson/mirror MirrorX-6.0.13-py3-none-any.whl
loongson/mirror MirrorX-6.0.0.tar.gz
loongson/mirror MirrorX-6.0.0-py3-none-any.whl