Slimfacenet文档中没有提供预训练模型
Created by: qingqing01
related to https://github.com/PaddlePaddle/PaddleDetection/issues/1364#issuecomment-687995392
Created by: qingqing01
related to https://github.com/PaddlePaddle/PaddleDetection/issues/1364#issuecomment-687995392