loongson/pypi: links for build-metadata

loongson/mirror build_metadata-0.2.tar.gz
loongson/mirror build_metadata-0.2-py3-none-any.whl
loongson/mirror build_metadata-0.1.1.tar.gz
loongson/mirror build_metadata-0.1.1-py3-none-any.whl
loongson/mirror build_metadata-0.1.tar.gz
loongson/mirror build_metadata-0.1-py3-none-any.whl