loongson/mirror: links for debugsnap

loongson/mirror debugsnap-0.1.8.tar.gz
loongson/mirror debugsnap-0.1.7.tar.gz
loongson/mirror debugsnap-0.1.6.tar.gz
loongson/mirror debugsnap-0.1.5.tar.gz
loongson/mirror debugsnap-0.1.4.tar.gz
loongson/mirror debugsnap-0.1.3.tar.gz