“4d8345e3ac0ba79a17359a72e940ade284c0b1a9”上不存在“paddle/fluid/framework/details/fused_broadcast_op_handle.h”
* Refine beam_search_op to output an extra parent_idx tensor. test=develop * Fix the unittest test_beam_search_op. test=develop * Fix the merging mistake. test=develop