loongson/pypi: links for checkpoint

loongson/mirror Checkpoint-0.2b1.tar.gz
loongson/mirror Checkpoint-0.2b1-py2.5.egg
loongson/mirror Checkpoint-0.1.tar.gz
loongson/mirror Checkpoint-0.1-py2.5.egg
loongson/mirror Checkpoint-0.1b2.tar.gz
loongson/mirror Checkpoint-0.1b2-py2.5.egg
loongson/mirror Checkpoint-0.1b1.tar.gz
loongson/mirror Checkpoint-0.1b1-py2.5.egg
loongson/mirror Checkpoint-0.1a1.tar.gz
loongson/mirror Checkpoint-0.1a1-py2.5.egg