C#/Java: Update model generator expected output.

Author: michaelnebel

csharp/ql/test/utils/modelgenerator/dataflow/Sinks.cs

@@ -21,7 +21,7 @@ public class NewSinks
     public static void Sink2(object o) => throw null;
 
     // Defined as sink neutral in the file next to the neutral summary test.
-    // MISSING NEUTRAL
+    // neutral=Sinks;NewSinks;NoSink;(System.Object);summary;df-generated
     public static void NoSink(object o) => throw null;
 
     // New sink

java/ql/test/utils/modelgenerator/dataflow/p/Sinks.java

@@ -23,7 +23,7 @@ public void sink2(Object o) {}
 
   // Defined as sink neutral file in the model file next to the
   // neutral test.
-  // MISSING NEUTRAL.
+  // neutral=p;Sinks;nosink;(Object);summary;df-generated
   public void nosink(Object o) {}
 
   // sink=p;Sinks;true;copyFileToDirectory;(Path,Path,CopyOption[]);;Argument[0];path-injection;df-generated