loongson/pypi: links for slingrpm

loongson/mirror slingrpm-1.0.0b3.tar.gz
loongson/mirror slingrpm-1.0.0b2.tar.gz
loongson/mirror slingrpm-1.0.0b1.tar.gz
loongson/mirror slingrpm-1.0.0a2.tar.gz
loongson/mirror slingrpm-1.0.0a1.tar.gz