C#/Java: Update model generation expected output.

Author: michaelnebel

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

@@ -25,7 +25,7 @@ public class NewSinks
     public static void NoSink(object o) => throw null;
 
     // Sink and Source defined in the extensible file next to the sink test.
-    // MISSING SINK
+    // sink=Sinks;NewSinks;false;SaveAndGet;(System.Object);;Argument[0];test-sink;df-generated
     // neutral=Sinks;NewSinks;SaveAndGet;(System.Object);summary;df-generated
     public static object SaveAndGet(object o)
     {

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

@@ -26,7 +26,7 @@ public void sink2(Object o) {}
   public void nosink(Object o) {}
 
   // Sink and Source defined in the extensible file next to the sink test.
-  // MISSING SINK
+  // sink=p;Sinks;true;saveAndGet;(Object);;Argument[0];test-sink;df-generated
   // neutral=p;Sinks;saveAndGet;(Object);summary;df-generated
   public Object saveAndGet(Object o) {
     sink(o);