[parser] don't add "id" property to section

Author: alunny

lib/parser/pbxproj.js

@@ -66,9 +66,12 @@ SimpleAssignment
 CommentedAssignment
   = commentedId:CommentedIdentifier _ "=" _ val:Value ";"
     {
-        commentedId[commentedId.id] = val;
-        delete(commentedId, 'id')
-        return commentedId;
+        var result = Object.create(null),
+            commentKey = commentedId.id + '_comment';
+
+        result[commentedId.id] = val;
+        result[commentKey] = commentedId.comment;
+        return result;
     }
     /
     id:Identifier _ "=" _ commentedVal:CommentedValue ";"