loongson/mirror: links for astd

loongson/mirror astd-6.5.tar.gz
loongson/mirror astd-6.4.tar.gz
loongson/mirror astd-6.3.tar.gz
loongson/mirror astd-6.2.tar.gz
loongson/mirror astd-6.1.tar.gz
loongson/mirror astd-6.tar.gz
loongson/mirror astd-5.tar.gz
loongson/mirror astd-4.tar.gz