Merge AnalyzerRunControl::logMessage and RunControl::appendMessage

The tools' ability to hook into processing of the output is
retained by making the function virtual.

Also remove the unusual overload of the RunControl::appendMessage
slot and the signal of the same name by renaming the signal.

Change-Id: If3c3cc2dd9c933169dc30b16e3165c9b3cf1440e
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/qnx/qnxanalyzesupport.cpp

@@ -159,7 +159,7 @@ void QnxAnalyzeSupport::remoteIsRunning()
 void QnxAnalyzeSupport::showMessage(const QString &msg, OutputFormat format)
 {
     if (state() != Inactive && m_runControl)
-        m_runControl->logApplicationMessage(msg, format);
+        m_runControl->appendMessage(msg, format);
     m_outputParser.processOutput(msg);
 }