Add StreamReader Tensor Binding to src (#2699)

Summary:
In https://github.com/pytorch/audio/issues/2694 CMakeLists.txt was not properly updated, so the tests are failing. This commit fix it.

Pull Request resolved: https://github.com/pytorch/audio/pull/2699

Reviewed By: carolineechen

Differential Revision: D39687409

Pulled By: mthrok

fbshipit-source-id: 2e14f3c478f1f8a112a03839f2dbcca51215fed7

torchaudio/csrc/CMakeLists.txt

@@ -149,6 +149,7 @@ if(USE_FFMPEG)
     ffmpeg/stream_reader/stream_reader.cpp
     ffmpeg/stream_reader/stream_reader_wrapper.cpp
     ffmpeg/stream_reader/stream_reader_binding.cpp
+    ffmpeg/stream_reader/stream_reader_tensor_binding.cpp
     ffmpeg/stream_writer/stream_writer.cpp
     ffmpeg/stream_writer/stream_writer_wrapper.cpp
     ffmpeg/stream_writer/stream_writer_binding.cpp