loongson/pypi: links for borca

loongson/mirror borca-2020.5-py3-none-any.whl
loongson/mirror borca-2020.2-py3-none-any.whl
loongson/mirror borca-2020.1-py3-none-any.whl
loongson/mirror borca-2020.1rc0-py3-none-any.whl