loongson/pypi: links for dynamicgraphviz

loongson/mirror dynamicgraphviz-0.8.0.tar.gz
loongson/mirror dynamicgraphviz-0.5.7.tar.gz
loongson/mirror dynamicgraphviz-0.5.6.tar.gz
loongson/mirror dynamicgraphviz-0.5.5.tar.gz
loongson/mirror dynamicgraphviz-0.5.4.tar.gz