Fix support import in mm_action_prediction/tools/build_multimodal_inputs.py

[e-caste]

The previous import (from tools import support) gave the following error with Python 3.8.5 on Ubuntu 20.04:

Saving dictionary: ../data/simmc_fashion/fashion_vocabulary.json
Saving embeddings: ../data/simmc_fashion/fashion_asset_embeds.npy
Traceback (most recent call last):
  File "tools/build_multimodal_inputs.py", line 18, in <module>
    from tools import support
ModuleNotFoundError: No module named 'tools'
Traceback (most recent call last):
  File "tools/build_multimodal_inputs.py", line 18, in <module>
    from tools import support
ModuleNotFoundError: No module named 'tools'
Traceback (most recent call last):
  File "tools/build_multimodal_inputs.py", line 18, in <module>
    from tools import support
ModuleNotFoundError: No module named 'tools'
Traceback (most recent call last):
  File "tools/extract_attribute_vocabulary.py", line 149, in <module>
    extract_action_attributes(parsed_args)
  File "tools/extract_attribute_vocabulary.py", line 41, in extract_action_attributes
    data = np.load(args["train_npy_path"], allow_pickle=True)[()]
  File "/home/$USER/path/simmc/venv/lib/python3.8/site-packages/numpy/lib/npyio.py", line 416, in load
    fid = stack.enter_context(open(os_fspath(file), "rb"))
FileNotFoundError: [Errno 2] No such file or directory: '../data/simmc_fashion/fashion_train_dials_mm_inputs.npy'

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[e-caste]

I have signed the CLA, the automated test should pass now. I think I don't have access to re-run it, so I'll just leave a comment here.

[facebook-github-bot]

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