loongson/pypi: links for decpac

loongson/mirror decpac-0.0.9.tar.gz
loongson/mirror decpac-0.0.6.tar.gz
loongson/mirror decpac-0.0.5.tar.gz
loongson/mirror decpac-0.0.4.tar.gz
loongson/mirror decpac-0.0.1.tar.gz