loongson/pypi: links for ltsfit

loongson/mirror ltsfit-6.0.2.tar.gz
loongson/mirror ltsfit-6.0.2-py3-none-any.whl
loongson/mirror ltsfit-5.0.20.tar.gz
loongson/mirror ltsfit-5.0.19.tar.gz
loongson/mirror ltsfit-5.0.18.tar.gz
loongson/mirror ltsfit-5.0.17.tar.gz