Fix compilation with Qt 5.

Change-Id: I4ace07cb2255ed8231659253f72a16cf626a077a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/libs/qmldebug/qdebugmessageclient.cpp

@@ -32,6 +32,8 @@
 
 #include "qdebugmessageclient.h"
 
+#include <QDataStream>
+
 namespace QmlDebug {
 
 QDebugMessageClient::QDebugMessageClient(QmlDebugConnection *client)

src/plugins/debugger/debuggeractions.h

@@ -33,6 +33,7 @@
 #ifndef DEBUGGER_ACTIONS_H
 #define DEBUGGER_ACTIONS_H
 
+#include <QObject>
 #include <QHash>
 #include <QMap>
 

src/plugins/debugger/gdb/symbian.h

@@ -35,6 +35,7 @@
 
 #include <QMap>
 #include <QByteArray>
+#include <QString>
 #include <QMetaType>
 #include <QVector>
 #include <QPair>