loongson/pypi: links for rdfcrawler

loongson/mirror RDFCrawler-1.5.1.tar.gz
loongson/mirror RDFCrawler-1.5.tar.gz
loongson/mirror RDFCrawler-1.4.5.tar.gz
loongson/mirror RDFCrawler-1.4.4.tar.gz
loongson/mirror RDFCrawler-1.4.3.tar.gz