loongson/pypi: links for fetch-ethercodes

loongson/mirror fetch-ethercodes-0.5.tar.gz
loongson/mirror fetch_ethercodes-0.5-py2.py3-none-any.whl
loongson/mirror fetch-ethercodes-0.4.tar.gz
loongson/mirror fetch_ethercodes-0.4-py2.py3-none-any.whl
loongson/mirror fetch-ethercodes-0.3.tar.gz