loongson/pypi: links for sleipnir-testing

loongson/mirror sleipnir.testing-0.1rc7.tar.gz
loongson/mirror sleipnir.testing-0.1rc6.tar.gz
loongson/mirror sleipnir.testing-0.1rc5.tar.gz
loongson/mirror sleipnir.testing-0.1rc4.tar.gz
loongson/mirror sleipnir.testing-0.1rc3.tar.gz
loongson/mirror sleipnir.testing-0.1rc2.tar.gz
loongson/mirror sleipnir.testing-0.1rc1.tar.gz