loongson/mirror: links for drf-metadata

loongson/mirror drf-metadata-0.1.12.tar.gz
loongson/mirror drf_metadata-0.1.12-py3-none-any.whl
loongson/mirror drf-metadata-0.1.11.tar.gz
loongson/mirror drf_metadata-0.1.11-py3-none-any.whl