loongson/pypi: links for nlib

loongson/mirror nlib-0.6.tar.gz
loongson/mirror nlib-0.5.tar.gz
loongson/mirror nlib-0.4.tar.gz
loongson/mirror nlib-0.3.tar.gz
loongson/mirror nlib-0.2.tar.gz
loongson/mirror nlib-0.1.tar.gz