loongson/pypi: links for pelican-ab

loongson/mirror pelican-ab-0.2.4.tar.gz
loongson/mirror pelican-ab-0.2.3.tar.gz
loongson/mirror pelican-ab-0.2.2.tar.gz
loongson/mirror pelican-ab-0.2.1.tar.gz
loongson/mirror pelican-ab-0.2.0.tar.gz