fix(caffe): update root level CMakeLists.txt

Author: vinay0410

DeepLearningSuite/CMakeLists.txt

@@ -92,10 +92,10 @@ endif()
 if(roscpp_FOUND)
  	add_definitions(-DJDERROS)
 endif()
-if(HAS_OPENCV_DNN)
+if(OpenCV_FOUND)
 	SET(ENABLE_DNN_CAFFE ON)
   add_definitions(-DENABLE_DNN_CAFFE)
-endif(HAS_OPENCV_DNN)
+endif(OpenCV_FOUND)
 
  add_subdirectory(libs)
  add_subdirectory(DeepLearningSuiteLib)