Moving unused ApproxHPVM-C benchmarks to ./benchmarks/legacy

...s/hpvm-tensor-rt/dnn_sources/src/promise/lenet_promise.cc

...SC/DNN_Benchmarks/benchmarks/legacy/alexnet_dsoc/Makefile

...Benchmarks/benchmarks/legacy/alexnet_dsoc/src/alexnet.cpp

...t/VISC/DNN_Benchmarks/benchmarks/legacy/blending/Makefile

..._Benchmarks/benchmarks/legacy/blending/bin/setup_paths.sh

...ks/legacy/blending/data/autotuner_data/tuner_confs_25.txt

...ks/legacy/blending/data/autotuner_data/tuner_confs_30.txt

..._Benchmarks/benchmarks/legacy/blending/data/promise_flags

...nchmarks/benchmarks/legacy/blending/data/quant_ranges.txt

...marks/benchmarks/legacy/blending/data/quant_ranges_rt.txt

...nchmarks/legacy/blending/data/soc_data/tuner_confs_25.txt

...nchmarks/legacy/blending/data/soc_data/tuner_confs_30.txt

...enchmarks/benchmarks/legacy/blending/data/tuner_confs.txt

...arks/benchmarks/legacy/blending/src/blend_direct_call.cpp

...VISC/DNN_Benchmarks/benchmarks/legacy/canny_test/Makefile

...enchmarks/benchmarks/legacy/canny_test/bin/setup_paths.sh

.../legacy/canny_test/data/autotuner_data/tuner_confs_25.txt

.../canny_test/data/autotuner_data/tuner_confs_25_ported.txt

...y/canny_test/data/autotuner_data/tuner_confs_25_remap.txt

.../legacy/canny_test/data/autotuner_data/tuner_confs_30.txt