Add descriptors for tensor runtime headers and implementation files

...pvm-tensor-rt/tensor_runtime/include/tensor_cpu_runtime.h

...pvm-tensor-rt/tensor_runtime/include/tensor_signatures.cc

...ts/hpvm-tensor-rt/tensor_runtime/src/approx_simulation.cu

...jects/hpvm-tensor-rt/tensor_runtime/src/configuration.cpp

hpvm/projects/hpvm-tensor-rt/tensor_runtime/src/fp16_gemm.cu

.../projects/hpvm-tensor-rt/tensor_runtime/src/group_conv.cu

...ects/hpvm-tensor-rt/tensor_runtime/src/wrapper_runtime.cu