loongson/pypi: links for cowch

loongson/mirror cowch-0.4-py3-none-any.whl
loongson/mirror cowch-0.3-py3-none-any.whl
loongson/mirror cowch-0.2-py3-none-any.whl
loongson/mirror cowch-0.1-py3-none-any.whl