loongson/mirror: links for mownfish

loongson/mirror mownfish-3.1.3.tar.gz
loongson/mirror mownfish-3.1.2.tar.gz
loongson/mirror mownfish-3.1.1.tar.gz
loongson/mirror mownfish-3.1.0.tar.gz
loongson/mirror mownfish-3.0.0.tar.gz
loongson/mirror mownfish-2.3.0.tar.gz