QmlProfiler: Allow user to specify a sysroot for "Attach to Port"

Change-Id: I943255e5a501610195e3758f9fbb42d127f15524
Reviewed-on: http://codereview.qt-project.org/6451
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Aurindam Jana <aurindam.jana@nokia.com>

src/plugins/debugger/debuggerdialogs.h

@@ -234,6 +234,9 @@ public:
     int port() const;
     void setPort(const int port);
 
+    QString sysroot() const;
+    void setSysroot(const QString &sysroot);
+
 private:
     Ui::AttachToQmlPortDialog *m_ui;
 };