loongson/pypi: links for markdown2mathjax

loongson/mirror markdown2Mathjax-0.3.8.tar.gz
loongson/mirror markdown2Mathjax-0.3.7.tar.gz
loongson/mirror markdown2Mathjax-0.3.6.tar.gz
loongson/mirror markdown2Mathjax-0.2.0.tar.gz