Added num of layers in net and netRT,suggestions from pull request 270 on main repo

CMakeLists.txt

@@ -6,6 +6,32 @@ set(CMAKE_CXX_STANDARD 14)
 option(ENABLE_OPENCV_CUDA_CONTRIB "Enable OpenCV CUDA Contrib" OFF )
 
 find_package(CUDA 9.0 REQUIRED)
+if (CUDA_FOUND)
+    set(OUTPUTFILE ${CMAKE_CURRENT_SOURCE_DIR}/cmake/cuda_script) # No suffix required
+    execute_process(COMMAND "rm ${OUTPUTFILE}")
+    set(CUDAFILE ${CMAKE_CURRENT_SOURCE_DIR}/cmake/getCudaArch.cu)
+    execute_process(COMMAND ${CUDA_NVCC_EXECUTABLE} -lcuda ${CUDAFILE} -o ${OUTPUTFILE})
+    execute_process(COMMAND ${OUTPUTFILE}
+            RESULT_VARIABLE CUDA_RETURN_CODE
+            OUTPUT_VARIABLE ARCH)
+
+    if(${CUDA_RETURN_CODE} EQUAL 0)
+        set(CUDA_SUCCESS "TRUE")
+    else()
+        set(CUDA_SUCCESS "FALSE")
+    endif()
+
+    if (${CUDA_SUCCESS})
+        message(STATUS "CUDA Architecture: ${ARCH}")
+        message(STATUS "CUDA Version: ${CUDA_VERSION_STRING}")
+        message(STATUS "CUDA Path: ${CUDA_TOOLKIT_ROOT_DIR}")
+        message(STATUS "CUDA Libararies: ${CUDA_LIBRARIES}")
+        message(STATUS "CUDA Performance Primitives: ${CUDA_npp_LIBRARY}")
+        set(CUDA_NVCC_FLAGS "${ARCH}")
+    else()
+        message(WARNING ${ARCH})
+    endif()
+endif()
 
 SET(CUDA_SEPARABLE_COMPILATION ON)