loongson/pypi: links for gym-pull

loongson/mirror gym-pull-0.1.7.tar.gz
loongson/mirror gym-pull-0.1.6.tar.gz
loongson/mirror gym-pull-0.1.5.tar.gz
loongson/mirror gym-pull-0.1.4.tar.gz
loongson/mirror gym-pull-0.1.3.tar.gz