loongson/pypi: links for libcluster

loongson/mirror libcluster-0.5.0.tar.gz
loongson/mirror libcluster-0.4.0.tar.gz
loongson/mirror libcluster-0.3.0.tar.gz
loongson/mirror libcluster-0.2.0.tar.gz
loongson/mirror libcluster-0.1.0.tar.gz