loongson/pypi: links for mx-helpers

loongson/mirror mx_helpers-0.0.5.tar.gz
loongson/mirror mx_helpers-0.0.4.tar.gz
loongson/mirror mx_helpers-0.0.3.tar.gz
loongson/mirror mx_helpers-0.0.2.tar.gz
loongson/mirror mx_helpers-0.0.1.tar.gz