loongson/pypi: links for gnureadline

loongson/pypi gnureadline-6.3.3.tar.gz
loongson/pypi gnureadline-6.3.3-cp39-cp39-linux_loongarch64.whl
loongson/pypi gnureadline-6.3.3-cp38-cp38-linux_loongarch64.whl
loongson/pypi gnureadline-6.3.3-cp37-cp37m-linux_loongarch64.whl
loongson/pypi gnureadline-6.3.3-cp36-cp36m-linux_loongarch64.whl