loongson/pypi: links for nnbuilder

loongson/mirror NNBuilder-0.3.7.tar.gz
loongson/mirror NNBuilder-0.3.6.tar.gz
loongson/mirror NNBuilder-0.3.5.tar.gz
loongson/mirror NNBuilder-0.3.1.tar.gz
loongson/mirror NNBuilder-0.3.0.tar.gz
loongson/mirror NNBuilder-0.2.0.tar.gz