loongson/pypi: links for xml-diff

loongson/mirror xml_diff-0.7.1.tar.gz
loongson/mirror xml_diff-0.7.1-py3-none-any.whl
loongson/mirror xml_diff-0.7.0.tar.gz
loongson/mirror xml_diff-0.6.0.tar.gz
loongson/mirror xml_diff-0.5.0.tar.gz