loongson/mirror: links for plone-portlet-viewlet

loongson/mirror plone.portlet.viewlet-0.4.tar.gz
loongson/mirror plone.portlet.viewlet-0.3.tar.gz
loongson/mirror plone.portlet.viewlet-0.2.tar.gz
loongson/mirror plone.portlet.viewlet-0.1.tar.gz