loongson/pypi: links for pypledge

loongson/mirror pypledge-0.3.1.tar.gz
loongson/mirror pypledge-0.3.tar.gz
loongson/mirror pypledge-0.2.1.tar.gz
loongson/mirror pypledge-0.2.tar.gz
loongson/mirror pypledge-0.1.tar.gz