loongson/pypi: links for extracttoc

loongson/mirror extracttoc-0.4.0.tar.gz
loongson/mirror extracttoc-0.4.0-py3-none-any.whl
loongson/mirror extracttoc-0.3.3.tar.gz
loongson/mirror extracttoc-0.3.3-py3-none-any.whl
loongson/mirror extracttoc-0.3.2.tar.gz
loongson/mirror extracttoc-0.3.2-py3-none-any.whl