Subtask of https://bugs.openjdk.org/browse/JDK-8363440

Right now, the AOT Map displays the KlassTrainingData like this:

```
0x00000008002aa5e0: @@ KlassTrainingData 40
0x00000008002ac260: @@ KlassTrainingData 40
```

which doesn't provide any context on what class is this training for.

Modify the AOT Map Logger so we can link the class to its training data:

```
0x00000008007d5940: @@ KlassTrainingData 40 jdk.internal.loader.BuiltinClassLoader
0x0000000800815398: @@ KlassTrainingData 40 java.lang.invoke.DirectMethodHandle
0x00000008008791f0: @@ KlassTrainingData 40 java.util.HashSet
0x00000008008bd980: @@ KlassTrainingData 40 java.lang.module.ModuleDescriptor$Exports
0x00000008008db8e8: @@ KlassTrainingData 40 java.lang.invoke.InvokerBytecodeGenerator```