loongson/mirror: links for alf

loongson/mirror alf-0.7.1.tar.gz
loongson/mirror alf-0.7.0.tar.gz
loongson/mirror alf-0.6.0.tar.gz
loongson/mirror alf-0.5.0.tar.gz
loongson/mirror alf-0.4.2.tar.gz
loongson/mirror alf-0.4.1.tar.gz
loongson/mirror alf-0.4.tar.gz