loongson/pypi: links for gdownloader

loongson/mirror gDownloader-2.5.tar.gz
loongson/mirror gDownloader-2.3.tar.gz
loongson/mirror gDownloader-2.2.tar.gz
loongson/mirror gDownloader-2.1.tar.gz
loongson/mirror gDownloader-2.0.tar.gz
loongson/mirror gDownloader-1.9.tar.gz
loongson/mirror gDownloader-1.8.tar.gz