loongson/mirror: links for northserve

loongson/mirror northserve-2.0.6.tar.gz
loongson/mirror northserve-2.0.6-py3-none-any.whl
loongson/mirror northserve-2.0.5.tar.gz
loongson/mirror northserve-2.0.5-py3-none-any.whl
loongson/mirror northserve-2.0.4.tar.gz
loongson/mirror northserve-2.0.4-py3-none-any.whl