loongson/pypi: links for isgithubdown

loongson/mirror isgithubdown-1.0.4.tar.gz
loongson/mirror isgithubdown-1.0.3.tar.gz
loongson/mirror isgithubdown-1.0.2.tar.gz
loongson/mirror isgithubdown-1.0.1.tar.gz
loongson/mirror isgithubdown-1.0.0.tar.gz