QmlDesigner: Add qdebugs for commands

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

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

@@ -30,6 +30,7 @@
 #include "informationchangedcommand.h"
 
 #include <QMetaType>
+#include <QtDebug>
 
 #include "propertyvaluecontainer.h"
 
@@ -73,4 +74,10 @@ bool operator ==(const InformationChangedCommand &first, const InformationChange
     return first.m_informationVector == second.m_informationVector;
 }
 
+QDebug operator <<(QDebug debug, const InformationChangedCommand &command)
+{
+    return debug.nospace() << "InformationChangedCommand(" << command.informations() << ")";
+}
+
+
 } // namespace QmlDesigner