Ios: Use Qt5-style connects

The heavy lifting was done by clazy.

Change-Id: I1b25f0108939d87e859d0407a35f75b88fa0edc3
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/ios/iosplugin.h

@@ -39,7 +39,7 @@ public:
 
     bool initialize(const QStringList &arguments, QString *errorMessage) override;
     void extensionsInitialized() override;
-private slots:
+private:
     void kitsRestored();
 };