loongson/mirror: links for acemd

loongson/mirror acemd-4.0.20.post2.tar.gz
loongson/mirror acemd-4.0.20.tar.gz
loongson/mirror acemd-4.0.18.tar.gz
loongson/mirror acemd-4.0.17.tar.gz
loongson/mirror acemd-4.0.16.tar.gz
loongson/mirror acemd-4.0.15.tar.gz
loongson/mirror acemd-4.0.14.tar.gz