loongson/pypi: links for howdou

loongson/mirror howdou-3.0.6.tar.gz
loongson/mirror howdou-3.0.4.tar.gz
loongson/mirror howdou-3.0.3.tar.gz
loongson/mirror howdou-3.0.2.tar.gz
loongson/mirror howdou-2.0.5.tar.gz
loongson/mirror howdou-2.0.4.tar.gz
loongson/mirror howdou-2.0.3.tar.gz
loongson/mirror howdou-2.0.2.tar.gz
loongson/mirror howdou-2.0.1.tar.gz
loongson/mirror howdou-2.0.0.tar.gz