Made JS enum declarations compatible with google closure

Original change by: https://github.com/alexames

Change-Id: Ib65bd02156d1c3637ed278a8334a2307caacaa44

tests/union_vector/union_vector_generated.js

@@ -1,16 +1,29 @@
 // automatically generated by the FlatBuffers compiler, do not modify
 
 /**
- * @enum
+ * @enum {number}
  */
 var Character = {
-  NONE: 0, 0: 'NONE',
-  MuLan: 1, 1: 'MuLan',
-  Rapunzel: 2, 2: 'Rapunzel',
-  Belle: 3, 3: 'Belle',
-  BookFan: 4, 4: 'BookFan',
-  Other: 5, 5: 'Other',
-  Unused: 6, 6: 'Unused'
+  NONE: 0,
+  MuLan: 1,
+  Rapunzel: 2,
+  Belle: 3,
+  BookFan: 4,
+  Other: 5,
+  Unused: 6
+};
+
+/**
+ * @enum {string}
+ */
+var CharacterName = {
+  0: 'NONE',
+  1: 'MuLan',
+  2: 'Rapunzel',
+  3: 'Belle',
+  4: 'BookFan',
+  5: 'Other',
+  6: 'Unused'
 };
 
 /**
@@ -459,6 +472,7 @@ Movie.createMovie = function(builder, mainCharacterType, mainCharacterOffset, ch
 
 // Exports for Node.js and RequireJS
 this.Character = Character;
+this.CharacterName = CharacterName;
 this.Attacker = Attacker;
 this.Rapunzel = Rapunzel;
 this.BookReader = BookReader;