Fix hipify script for pytorch extensions (#43528)
Summary:
PyTorch extensions can have .cpp or .h files which contain CUDA code that needs to be hipified. The current hipify script logic has overly strict conditions to determine which files get considered for hipification: https://github.com/pytorch/pytorch/blob/master/torch/utils/hipify/hipify_python.py#L146
These conditions might apply well to pytorch/caffe2 source code, but are overconstrained for third-party extensions.
`is_pytorch_file` conditions: https://github.com/pytorch/pytorch/blob/master/torch/utils/hipify/hipify_python.py#L549
`is_caffe2_gpu_file` conditions: https://github.com/pytorch/pytorch/blob/master/torch/utils/hipify/hipify_python.py#L561
This PR relaxes these conditions if we're hipifying a pytorch extension (specified by `is_pytorch_extension=True`) and considers all the file extensions specified using the `extensions` parameter: https://github.com/pytorch/pytorch/blob/master/torch/utils/hipify/hipify_python.py#L820
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43528
Reviewed By: mruberry
Differential Revision: D23328272
Pulled By: ngimel
fbshipit-source-id: 1e9c3a54ae2da65ac596a7ecd5539f3e14eeed88
