libgui: enable fence support for exynos5

Change-Id: Iffc48412b8c951116a956a3ac7dab8d75eed13da
Bug: 7238122
diff --git a/libs/gui/Android.mk b/libs/gui/Android.mk
index 902aeca..d970a33 100644
--- a/libs/gui/Android.mk
+++ b/libs/gui/Android.mk
@@ -46,7 +46,8 @@
 	LOCAL_CFLAGS += -DUSE_FENCE_SYNC
 endif
 ifeq ($(TARGET_BOARD_PLATFORM), exynos5)
-	LOCAL_CFLAGS += -DUSE_FENCE_SYNC
+	LOCAL_CFLAGS += -DUSE_NATIVE_FENCE_SYNC
+	LOCAL_CFLAGS += -DUSE_WAIT_SYNC
 endif
 ifneq ($(filter generic%,$(TARGET_DEVICE)),)
     # Emulator build