loongson/pypi: links for buildout-platform-versions

loongson/mirror buildout-platform-versions-1.2.3.tar.gz
loongson/mirror buildout_platform_versions-1.2.3-py2.7.egg
loongson/mirror buildout-platform-versions-1.2.2.tar.gz
loongson/mirror buildout_platform_versions-1.2.2-py2.7.egg
loongson/mirror buildout-platform-versions-1.2.1.tar.gz
loongson/mirror buildout_platform_versions-1.2.1-py2.7.egg
loongson/mirror buildout-platform-versions-1.2.0.tar.gz
loongson/mirror buildout_platform_versions-1.2.0-py2.7.egg