Move YGLogger into YGConfig and associate YGNodeRef with log events

Summary:
Moves the `YGLogger` into `YGConfig` and pass the `YGNodeRef` into the logger to be able to associate the log messages and assertions with the specific node.

Tackles facebook/yoga#530 and facebook/yoga#446
Closes https://github.com/facebook/yoga/pull/531

Reviewed By: astreet

Differential Revision: D4970149

Pulled By: emilsjolander

fbshipit-source-id: b7fcdaa273143ea2fa35861620b2e4d79f04f0af

java/com/facebook/yoga/YogaLogLevel.java

@@ -17,7 +17,8 @@ public enum YogaLogLevel {
   WARN(1),
   INFO(2),
   DEBUG(3),
-  VERBOSE(4);
+  VERBOSE(4),
+  FATAL(5);
 
   private int mIntValue;
 
@@ -36,6 +37,7 @@ public enum YogaLogLevel {
       case 2: return INFO;
       case 3: return DEBUG;
       case 4: return VERBOSE;
+      case 5: return FATAL;
       default: throw new IllegalArgumentException("Unknown enum value: " + value);
     }
   }