Add debug mode to measure performance.

Change-Id: I9d4c84034dc200b99c8266165942a7cdbcb5c0c5
diff --git a/libs/hwui/Android.mk b/libs/hwui/Android.mk
index 0469508..e8ffd99 100644
--- a/libs/hwui/Android.mk
+++ b/libs/hwui/Android.mk
@@ -5,11 +5,13 @@
 # defined in the current device/board configuration
 ifeq ($(USE_OPENGL_RENDERER),true)
 	LOCAL_SRC_FILES:= \
+		FboCache.cpp \
 		FontRenderer.cpp \
 		GammaFontRenderer.cpp \
 		GradientCache.cpp \
 		LayerCache.cpp \
 		Matrix.cpp \
+		OpenGLDebugRenderer.cpp \
 		OpenGLRenderer.cpp \
 		Patch.cpp \
 		PatchCache.cpp \