Fix a warning about calling virtual method from d'tor

Fix the following clang-tidy warning:
Call to virtual method 'IosRunner::stop' during destruction bypasses
virtual dispatch [clang-analyzer-optin.cplusplus.VirtualCall]

Remove the reimplementation of IosRunSupport::stop(), as it was
calling base implementation. Make base IosRunner::stop() a final
method.

Change-Id: I8e57a6dd6a44d2a6f00f5af96a11530f62c92429
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/ios/iosrunner.cpp

@@ -369,11 +369,6 @@ void IosRunSupport::start()
     IosRunner::start();
 }
 
-void IosRunSupport::stop()
-{
-    IosRunner::stop();
-}
-
 //
 // IosQmlProfilerSupport
 //

src/plugins/ios/iosrunner.h

@@ -60,7 +60,7 @@ public:
     QmlDebug::QmlDebugServicesPreset qmlDebugServices() const;
 
     void start() override;
-    void stop() override;
+    void stop() override final;
 
     virtual void appOutput(const QString &/*output*/) {}
     virtual void errorMsg(const QString &/*msg*/) {}
@@ -106,7 +106,6 @@ public:
     void didStartApp(IosToolHandler::OpStatus status);
 private:
     void start() override;
-    void stop() override;
 };