loongson/pypi: links for dotplot

loongson/mirror dotplot-0.4.5.tar.gz
loongson/mirror dotplot-0.4.4.tar.gz
loongson/mirror dotplot-0.4.3.tar.gz
loongson/mirror dotplot-0.4.1.tar.gz
loongson/mirror dotplot-0.4.tar.gz