Created by: qingqing01

1. Add generate_mask_labels_op to support Mask-RCNN.
2. Refine sigmoid_cross_entropy to support nomalize mode.
3. Fix generator_proposals_label.
4. Use DeviceTemporaryAllocator in roi_pool and roi_algin.
5. Fix https://github.com/PaddlePaddle/models/issues/1649 https://github.com/PaddlePaddle/Paddle/issues/15317