loongson/pypi: links for mygraphtools

loongson/mirror mygraphtools-1.2.1.tar.gz
loongson/mirror mygraphtools-1.2.0.tar.gz
loongson/mirror mygraphtools-1.1.0.tar.gz
loongson/mirror mygraphtools-1.0.1.tar.gz
loongson/mirror mygraphtools-1.0.0.tar.gz