loongson/pypi: links for spikex

loongson/mirror spikex-0.5.2.tar.gz
loongson/mirror spikex-0.5.1.tar.gz
loongson/mirror spikex-0.5.0.tar.gz
loongson/mirror spikex-0.4.0.tar.gz
loongson/mirror spikex-0.3.0.tar.gz