loongson/pypi: links for nsi-bertrand

loongson/mirror NSI_Bertrand-0.5.1.tar.gz
loongson/mirror NSI_Bertrand-0.4.1.tar.gz
loongson/mirror NSI_Bertrand-0.4.tar.gz
loongson/mirror NSI_Bertrand-0.3.tar.gz
loongson/mirror NSI_Bertrand-0.2.tar.gz
loongson/mirror NSI_Bertrand-0.1.tar.gz