QmlDesigner: Add qdebugs for commands

Change-Id: I60bdd5b36749be5092d4dabe486b101d62b3df06
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

share/qtcreator/qml/qmlpuppet/commands/createinstancescommand.cpp

@@ -30,6 +30,7 @@
 #include "createinstancescommand.h"
 
 #include <QDataStream>
+#include <QDebug>
 
 namespace QmlDesigner {
 
@@ -61,4 +62,9 @@ QDataStream &operator>>(QDataStream &in, CreateInstancesCommand &command)
     return in;
 }
 
+QDebug operator <<(QDebug debug, const CreateInstancesCommand &command)
+{
+    return debug.nospace() << "CreateInstancesCommand(" << command.instances() << ")";
+}
+
 } // namespace QmlDesigner