loongson/pypi: links for buildout-helpers

loongson/mirror buildout_helpers-1.0.1.tar.gz
loongson/mirror buildout_helpers-1.0.0.tar.gz
loongson/mirror buildout_helpers-1.0.0b5.tar.gz
loongson/mirror buildout_helpers-1.0.0b4.tar.gz
loongson/mirror buildout_helpers-1.0.0b3.tar.gz
loongson/mirror buildout_helpers-1.0.0b2.tar.gz
loongson/mirror buildout_helpers-1.0.0b1.tar.gz