loongson/pypi: links for solvers

loongson/mirror solvers-0.6.tar.gz
loongson/mirror solvers-0.5.tar.gz
loongson/mirror solvers-0.4.tar.gz
loongson/mirror solvers-0.3.tar.gz
loongson/mirror solvers-0.2.tar.gz
loongson/mirror solvers-0.1.tar.gz