loongson/pypi: links for e2xgrader-cell-registry

loongson/mirror e2xgrader_cell_registry-0.0.1a2.tar.gz
loongson/mirror e2xgrader_cell_registry-0.0.1a2-py3-none-any.whl
loongson/mirror e2xgrader_cell_registry-0.0.1a1.tar.gz
loongson/mirror e2xgrader_cell_registry-0.0.1a1-py3-none-any.whl