Add baseline for error baseline

tests/baselines/reference/objectTypesWithOptionalProperties2.js

@@ -42,5 +42,6 @@ var C2 = (function () {
     return C2;
 })();
 var b = {
-    x: function () { }, 1:  // error
+    x: function () { }, 1: // error
+     // error
 };