loongson/mirror: links for proxies

loongson/mirror proxies-1.6.tar.gz
loongson/mirror proxies-1.5.tar.gz
loongson/mirror proxies-1.4.tar.gz
loongson/mirror proxies-1.3.tar.gz
loongson/mirror proxies-1.2.tar.gz
loongson/mirror proxies-1.0.tar.gz