loongson/pypi: links for ultratransmission

loongson/mirror ultratransmission-1.6.4.tar.gz
loongson/mirror ultratransmission-1.6.3.tar.gz
loongson/mirror ultratransmission-1.6.2.tar.gz
loongson/mirror ultratransmission-1.6.tar.gz
loongson/mirror ultratransmission-1.6.linux-x86_64.tar.gz