loongson/mirror: links for m4us

loongson/mirror m4us-0.3.0.tar.gz
loongson/mirror m4us-0.2.1.tar.gz
loongson/mirror m4us-0.2.tar.gz
loongson/mirror m4us-0.1.1.tar.gz
loongson/mirror m4us-0.1.tar.gz