ParlAI train an attentive LSTM example error

In ParlAI
Trains an attentive LSTM model on the SQuAD dataset with a batch size of 32 examples (pytorch and regex):
```bash
python examples/drqa/train.py -t squad -bs 32
```

with an error:

version `GOMP_4.0' not found 

solution:

rename or remove the libgomp.so.1 in pytorch package

force it to use libgomp.so.1 installed by the system

sudo mv /usr/local/lib/python3.5/dist-packages/torch/lib/libgomp.so.1 /usr/local/lib/python3.5/dist-packages/torch/lib/libgomp.so.1.back

reference:

https://github.com/hughperkins/pytorch/issues/28