Changes to Makefile of visc_parallel version as well required for previous commit

llvm/test/VISC/parboil/benchmarks/pipeline/src/visc_parallel/Makefile

@@ -4,8 +4,8 @@ LANGUAGE=visc
 SRCDIR_OBJS=io.ll #compute_gold.o
 VISC_OBJS=main.visc.ll
 APP_CUDALDFLAGS=-lm -lstdc++
-APP_CFLAGS=-ffast-math -O3 -I/opt/opencv/include
-APP_CXXFLAGS=-ffast-math -O3 -I/opt/opencv/include
+APP_CFLAGS+=-ffast-math -O3 -I/opt/opencv/include
+APP_CXXFLAGS+=-ffast-math -O3 -I/opt/opencv/include
 APP_LDFLAGS=-L/usr/local/cuda/lib64 -rdynamic /opt/opencv/lib/libopencv_videostab.so.3.0.0 /opt/opencv/lib/libopencv_videoio.so.3.0.0 /opt/opencv/lib/libopencv_video.so.3.0.0 /opt/opencv/lib/libopencv_superres.so.3.0.0 /opt/opencv/lib/libopencv_stitching.so.3.0.0 /opt/opencv/lib/libopencv_shape.so.3.0.0 /opt/opencv/lib/libopencv_photo.so.3.0.0 /opt/opencv/lib/libopencv_objdetect.so.3.0.0 /opt/opencv/lib/libopencv_ml.so.3.0.0 /opt/opencv/lib/libopencv_imgproc.so.3.0.0 /opt/opencv/lib/libopencv_imgcodecs.so.3.0.0 /opt/opencv/lib/libopencv_highgui.so.3.0.0 /opt/opencv/lib/libopencv_hal.a /opt/opencv/lib/libopencv_flann.so.3.0.0 /opt/opencv/lib/libopencv_features2d.so.3.0.0 /opt/opencv/lib/libopencv_core.so.3.0.0 /opt/opencv/lib/libopencv_calib3d.so.3.0.0 /opt/opencv/lib/libopencv_hal.a -ldl -lm -lpthread -lrt /opt/opencv/share/OpenCV/3rdparty/lib/libippicv.a -Wl,-rpath,/usr/local/cuda/lib64:/opt/opencv/lib 
 
 #OpenCV link flags all