loongson/pypi: links for raptus-article-reference

loongson/mirror raptus.article.reference-2.0b6.tar.gz
loongson/mirror raptus.article.reference-2.0b5.tar.gz
loongson/mirror raptus.article.reference-2.0b4.tar.gz
loongson/mirror raptus.article.reference-2.0b3.tar.gz