loongson/pypi: links for pynacl

loongson/pypi PyNaCl-1.4.0.tar.gz
loongson/pypi PyNaCl-1.4.0-cp38-cp38-linux_loongarch64.whl
loongson/pypi PyNaCl-1.4.0-cp27-cp27mu-linux_loongarch64.whl
loongson/pypi PyNaCl-1.2.1.tar.gz
loongson/pypi PyNaCl-1.2.1-cp27-cp27mu-linux_loongarch64.whl