Changes to media probing API.

Added flush signals.

Change-Id: I9c124317e843c9b9011e69c44649ae9a4e974161
Reviewed-by: Dmytro Poplavskiy <dmytro.poplavskiy@nokia.com>

src/multimedia/controls/qmediaaudioprobecontrol.h

@@ -59,6 +59,7 @@ public:
 
 signals:
     void audioBufferProbed(const QAudioBuffer &buffer);
+    void flush();
 
 protected:
     explicit QMediaAudioProbeControl(QObject *parent = 0);