Include and link cuda and CUDNN when DUSE_CUDA=True

src/ngraph/CMakeLists.txt

@@ -82,6 +82,8 @@ set (SRC
 if(USE_CUDA)
   find_package(CUDA 8 REQUIRED)
   if(CUDA_FOUND)
+    include_directories(SYSTEM ${CUDA_INCLUDE_DIR})
+    link_directories(${CUDA_LIB_DIR})
     if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND
           NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 6.0 AND
           CUDA_HOST_COMPILER STREQUAL CMAKE_C_COMPILER)
@@ -96,6 +98,9 @@ if(USE_CUDA)
           "If cuDNN is installed, try setting -DCUDNN_ROOT_DIR"
           "Not compiling with CUDA. Suppress this warning with -DUSE_CUDA=OFF")
           set(USE_CUDA OFF)
+    else()
+    include_directories(SYSTEM ${CUDNN_INCLUDE_DIR})
+    link_directories(${CUDNN_LIB_DIR})
     endif()
   else()
     message(WARNING "Not compiling with CUDA. Suppress this warning with -DUSE_CUDA=OFF")