loongson/pypi: links for pycountdown

loongson/mirror pycountdown-2.1.tar.gz
loongson/mirror pycountdown-2.0.tar.gz
loongson/mirror pycountdown-1.3.tar.gz
loongson/mirror pycountdown-1.2.tar.gz
loongson/mirror pycountdown-1.1.tar.gz
loongson/mirror pycountdown-1.0.tar.gz
loongson/mirror pycountdown-0.4.tar.gz
loongson/mirror pycountdown-0.3.tar.gz
loongson/mirror pycountdown-0.2.tar.gz
loongson/mirror pycountdown-0.1.tar.gz