Prettify display lists logging

This change makes it a lot easier to see the tree structure.

Change-Id: I4969abd1eb010f1d529671f8d86dc4c930be24f6
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index e5fd7b9..b832931 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -1799,7 +1799,7 @@
 
 void OpenGLRenderer::outputDisplayList(DisplayList* displayList) {
     if (displayList) {
-        displayList->output(0);
+        displayList->output(1);
     }
 }