loongson/pypi: links for math2d

loongson/mirror math2d-0.7.1.tar.gz
loongson/mirror math2d-0.7.tar.gz
loongson/mirror math2d-0.6.tar.gz
loongson/mirror math2d-0.5.tar.gz
loongson/mirror math2d-0.4.tar.gz
loongson/mirror math2d-0.3.tar.gz
loongson/mirror math2d-0.2.tar.gz