loongson/pypi: links for rdfcalendar

loongson/mirror RDFCalendar-0.2.6.tar.gz
loongson/mirror RDFCalendar-0.2.5.tar.gz
loongson/mirror RDFCalendar-0.2.4.tar.gz
loongson/mirror RDFCalendar-0.2.3.tar.gz
loongson/mirror RDFCalendar-0.2.2.tar.gz