Preprocess for rnnt doesn't work (NVIDIA)

[mahmoodn]

Similar to this issue, the preprocess for rnnt doesn't work due to an error with make clone_loadgen.

(mlperf) mahmood@mlperf-inference-mahmood-x86-64-29597:/work$ make preprocess_data BENCHMARKS="rnnt"
/usr/local/lib/python3.8/dist-packages/torchvision/io/image.py:13: UserWarning: Failed to load image Python extension: ''If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
[2024-06-26 08:24:19,927 preprocess_data.py:49 INFO] Updating reference repo for convert_librispeech.py script...
[2024-06-26 08:24:19,927 __init__.py:46 INFO] Running command: make clone_loadgen
make[1]: Entering directory '/work'
Cloning Official MLPerf Inference (For Loadgen Files)
fatal: destination path '/work/build/inference' already exists and is not an empty directory.
make[1]: *** [/work/Makefile.build:194: clone_loadgen] Error 128
make[1]: Leaving directory '/work'
Traceback (most recent call last):
  File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/work/code/rnnt/tensorrt/preprocess_data.py", line 189, in <module>
    main()
  File "/work/code/rnnt/tensorrt/preprocess_data.py", line 183, in main
    preprocess_rnnt(data_dir, preprocessed_data_dir)
  File "/work/code/rnnt/tensorrt/preprocess_data.py", line 50, in preprocess_rnnt
    run_command("make clone_loadgen")
  File "/work/code/common/__init__.py", line 48, in run_command
    return subprocess.check_call(cmd, shell=True)
  File "/usr/lib/python3.8/subprocess.py", line 364, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command 'make clone_loadgen' returned non-zero exit status 2.
make: *** [/work/Makefile.data:36: preprocess_data] Error 1