loongson/pypi: links for basefs

loongson/mirror basefs-0.7.tar.gz
loongson/mirror basefs-0.6.tar.gz
loongson/mirror basefs-0.5.4.tar.gz
loongson/mirror basefs-0.5.3.tar.gz
loongson/mirror basefs-0.5.2.tar.gz
loongson/mirror basefs-0.5.1.tar.gz