loongson/pypi: links for g2lib

loongson/mirror g2lib-3.1.0.post2.tar.gz
loongson/mirror G2lib-3.1.0.post1.tar.gz
loongson/mirror G2lib-3.1.0.post0.tar.gz
loongson/mirror G2lib-3.0.0.post1.tar.gz
loongson/mirror G2lib-3.0.0.tar.gz