loongson/pypi: links for sailenv

loongson/mirror sailenv-0.5b0.tar.gz
loongson/mirror sailenv-0.4b0.tar.gz
loongson/mirror sailenv-0.3b0.tar.gz
loongson/mirror sailenv-0.0.2b0.tar.gz
loongson/mirror sailenv-0.0.2b0-py3-none-any.whl