added impl for @UtilityClass.

test/transform/resource/after-ecj/UtilityClassErrors.java

@@ -0,0 +1,20 @@
+final @lombok.experimental.UtilityClass class UtilityClassErrors1 {
+  private static String someField;
+  protected UtilityClassErrors1() {
+    super();
+  }
+  static void method() {
+    @lombok.experimental.UtilityClass class MethodLocalClass {
+      MethodLocalClass() {
+        super();
+      }
+    }
+  }
+}
+@lombok.experimental.UtilityClass enum UtilityClassErrors2 {
+  <clinit>() {
+  }
+  UtilityClassErrors2() {
+    super();
+  }
+}