SurfaceTexture: use fence sync on omap4 & s5pc110

This change enables the use of the EGL_KHR_fence_sync extension in
SurfaceTexture on omap4 and s5pc110 platforms.

Change-Id: Icad5245bab445413ffb8a7c823c296b678bf3250
diff --git a/libs/gui/Android.mk b/libs/gui/Android.mk
index b8be67d..b6f5b9e 100644
--- a/libs/gui/Android.mk
+++ b/libs/gui/Android.mk
@@ -34,6 +34,13 @@
 
 LOCAL_MODULE:= libgui
 
+ifeq ($(TARGET_BOARD_PLATFORM), omap4)
+	LOCAL_CFLAGS += -DUSE_FENCE_SYNC
+endif
+ifeq ($(TARGET_BOARD_PLATFORM), s5pc110)
+	LOCAL_CFLAGS += -DUSE_FENCE_SYNC
+endif
+
 ifeq ($(TARGET_BOARD_PLATFORM), tegra)
 	LOCAL_CFLAGS += -DALLOW_DEQUEUE_CURRENT_BUFFER
 endif