Yet more layer tracking logging

 Bug: 17208461

Change-Id: I55e7d0921eb565867e966d68b798b7b92c391b55
diff --git a/libs/hwui/Layer.h b/libs/hwui/Layer.h
index 38c29c7..911b99880 100644
--- a/libs/hwui/Layer.h
+++ b/libs/hwui/Layer.h
@@ -306,6 +306,7 @@
     Rect dirtyRect;
     bool debugDrawUpdate;
     bool hasDrawnSinceUpdate;
+    bool wasBuildLayered;
 
 private:
     void requireRenderer();