fix rnn_cell_test in fbcode (#2107)
fix rnn_cell_test in fbcode (#2107)


Yangqing/caffe2,Yangqing/caffe2,xzturn/caffe2,Yangqing/caffe2,xzturn/caffe2,xzturn/caffe2,xzturn/caffe2,Yangqing/caffe2,caffe2/caffe2,xzturn/caffe2,Yangqing/caffe2