loongson/pypi: links for cs-vt

loongson/mirror cs.vt-20190309.tar.gz
loongson/mirror cs.vt-20190221.tar.gz
loongson/mirror cs.vt-20181231.2.tar.gz
loongson/mirror cs.vt-20181231.1.tar.gz
loongson/mirror cs.vt-20181231.tar.gz