Mark injected fields as generated

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

@@ -1,7 +1,7 @@
 import lombok.Synchronized;
 public class SynchronizedInInitializer {
   public static final Runnable SYNCHRONIZED = new Runnable() {
-    private final java.lang.Object $lock = new java.lang.Object[0];
+    private final @java.lang.SuppressWarnings("all") @lombok.Generated java.lang.Object $lock = new java.lang.Object[0];
     public @Override @Synchronized void run() {
       synchronized (this.$lock)
         {