loongson/pypi: links for urcv

loongson/mirror urcv-0.0.7.tar.gz
loongson/mirror urcv-0.0.6.tar.gz
loongson/mirror urcv-0.0.5.tar.gz
loongson/mirror urcv-0.0.4.tar.gz
loongson/mirror urcv-0.0.3.tar.gz
loongson/mirror urcv-0.0.3b0.tar.gz
loongson/mirror urcv-0.0.3a0.tar.gz
loongson/mirror urcv-0.0.2.tar.gz