gpu_tonemapper: Fix compilation issue with GraphicBuffer

Handle different version of GraphicBuffer with a compile time
flag.

CRs-Fixed: 1111917
Change-Id: I11aa6d64a8e61a4d7658cb5f924ee4dc38c40bc9
diff --git a/gpu_tonemapper/Android.mk b/gpu_tonemapper/Android.mk
index 9ae3840..4f716d2 100644
--- a/gpu_tonemapper/Android.mk
+++ b/gpu_tonemapper/Android.mk
@@ -11,7 +11,7 @@
 LOCAL_MODULE_TAGS         := optional
 LOCAL_C_INCLUDES          := $(TARGET_OUT_HEADERS)/qcom/display/
 
-LOCAL_CFLAGS              := -Wno-missing-field-initializers -Wall \
+LOCAL_CFLAGS              := $(version_flag) -Wno-missing-field-initializers -Wall \
                              -Wno-unused-parameter -std=c++11 -DLOG_TAG=\"GPU_TONEMAPPER\"
 
 LOCAL_SRC_FILES           := TonemapFactory.cpp \