loongson/pypi: links for ftptool

loongson/mirror ftptool-0.7.1.tar.gz
loongson/mirror ftptool-0.5.1.tar.gz
loongson/mirror ftptool-0.5.tar.gz
loongson/mirror ftptool-0.4.2.tar.gz
loongson/mirror ftptool-0.4.1.tar.gz
loongson/mirror ftptool-0.4.tar.gz