QmlProfiler: show warning when no executable given

Task-number: QTCREATORBUG-5266
Change-Id: If1639e322f4ab0d7065e3394129c6649f17e98c9
Reviewed-on: http://codereview.qt.nokia.com/2039
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Aurindam Jana <aurindam.jana@nokia.com>

src/plugins/qmlprofiler/localqmlprofilerrunner.h

@@ -62,6 +62,8 @@ public:
     virtual void stop();
     virtual int debugPort() const;
 
+    bool hasExecutable() const { return !m_configuration.executable.isEmpty(); }
+
 private slots:
     void spontaneousStop(int exitCode);