pQRNN - TF Lite custom operator pooling_op missing

[diegoantognini]

Prerequisites

Please answer the following question for yourself before submitting an issue.

• [x] I checked to make sure that this issue has not been filed already.

1. The entire URL of the documentation with the issue

https://github.com/tensorflow/models/tree/master/research/seq_flow_lite/tflite_ops and https://github.com/tensorflow/models/blob/master/research/seq_flow_lite/layers/qrnn_layers.py#L46

2. Describe the issue

The current version of pQRNN cannot be executed with Tensorflow Lite because there is a custom operator missing; all the others are provided in seq_flow_lite/tflite_ops.

Missing files: pooling_op.h and pooling_op.cc (or equivalent)

[ginz]

AFAIU, you should use Register_QRNN_POOLING from tflite_qrnn_pooling.h