OpenGL tracing.

Enable with:

adb shell setprop debug.egl.trace 1

Change-Id: Icfbc795f5260141510975228e72234e9aab56a85
diff --git a/opengl/libs/Android.mk b/opengl/libs/Android.mk
index ae924cd..c8041fc 100644
--- a/opengl/libs/Android.mk
+++ b/opengl/libs/Android.mk
@@ -8,6 +8,7 @@
 
 LOCAL_SRC_FILES:= 	       \
 	EGL/egl.cpp 	       \
+	EGL/trace.cpp              \
 	EGL/getProcAddress.cpp.arm \
 	EGL/hooks.cpp 	       \
 	EGL/Loader.cpp 	       \
@@ -33,6 +34,7 @@
 LOCAL_CFLAGS += -DLOG_TAG=\"libEGL\"
 LOCAL_CFLAGS += -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
 LOCAL_CFLAGS += -fvisibility=hidden
+LOCAL_CFLAGS += -DEGL_TRACE=1
 
 ifeq ($(TARGET_BOARD_PLATFORM),msm7k)
 LOCAL_CFLAGS += -DADRENO130=1