Mark injected fields as generated

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

@@ -1,6 +1,6 @@
 @lombok.extern.slf4j.Slf4j class LoggerWithConfig {
-  private final org.slf4j.Logger myLogger = org.slf4j.LoggerFactory.getLogger(LoggerWithConfig.class);
+  private final @java.lang.SuppressWarnings("all") @lombok.Generated org.slf4j.Logger myLogger = org.slf4j.LoggerFactory.getLogger(LoggerWithConfig.class);
   LoggerWithConfig() {
     super();
   }
-}
+}