Adding barebones test case for ApproxHPVM-HPVM merge

llvm/test/VISC/DNN_Benchmarks/benchmarks/cava_test/Makefile

...DNN_Benchmarks/benchmarks/cava_test/src/cam-vision-native

...t/VISC/DNN_Benchmarks/benchmarks/cava_test/src/cam_pipe.c

...t/VISC/DNN_Benchmarks/benchmarks/cava_test/src/cam_pipe.h

...NN_Benchmarks/benchmarks/cava_test/src/cam_pipe_utility.c

...NN_Benchmarks/benchmarks/cava_test/src/cam_pipe_utility.h

.../test/VISC/DNN_Benchmarks/benchmarks/cava_test/src/defs.h

...C/DNN_Benchmarks/benchmarks/cava_test/src/dma_interface.c

...C/DNN_Benchmarks/benchmarks/cava_test/src/dma_interface.h

...SC/DNN_Benchmarks/benchmarks/cava_test/src/gem5_harness.h

.../DNN_Benchmarks/benchmarks/cava_test/src/load_cam_model.c

.../DNN_Benchmarks/benchmarks/cava_test/src/load_cam_model.h

.../test/VISC/DNN_Benchmarks/benchmarks/cava_test/src/main.c

...t/VISC/DNN_Benchmarks/benchmarks/cava_test/src/main_old.c

...t/VISC/DNN_Benchmarks/benchmarks/cava_test/src/new_main.c

...ISC/DNN_Benchmarks/benchmarks/cava_test/src/pipe_stages.c

...ISC/DNN_Benchmarks/benchmarks/cava_test/src/pipe_stages.h

...st/VISC/DNN_Benchmarks/benchmarks/cava_test/src/rename.sh

...st/VISC/DNN_Benchmarks/benchmarks/cava_test/src/utility.c

...st/VISC/DNN_Benchmarks/benchmarks/cava_test/src/utility.h