loongson/pypi: links for flake8-pantsbuild

loongson/mirror flake8-pantsbuild-2.0.0.tar.gz
loongson/mirror flake8_pantsbuild-2.0.0-py3-none-any.whl
loongson/mirror flake8-pantsbuild-1.0.0.tar.gz
loongson/mirror flake8_pantsbuild-1.0.0-py2.py3-none-any.whl
loongson/mirror flake8-pantsbuild-1.0.0rc0.tar.gz
loongson/mirror flake8_pantsbuild-1.0.0rc0-py2.py3-none-any.whl