ExtensionSystem/Aggregation: Use override consistently

clang-tidy fixes from modernize-use-override check.

Change-Id: Ic10099c2a2f3a070c972442736e50e797a063597
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/aggregation/aggregate.h

@@ -41,7 +41,7 @@ class AGGREGATION_EXPORT Aggregate : public QObject
 
 public:
     Aggregate(QObject *parent = 0);
-    virtual ~Aggregate();
+    ~Aggregate() override;
 
     void add(QObject *component);
     void remove(QObject *component);

src/libs/extensionsystem/iplugin.h

@@ -51,7 +51,7 @@ public:
     };
 
     IPlugin();
-    virtual ~IPlugin();
+    ~IPlugin() override;
 
     virtual bool initialize(const QStringList &arguments, QString *errorString) = 0;
     virtual void extensionsInitialized() = 0;

src/libs/extensionsystem/plugindetailsview.h

@@ -44,7 +44,7 @@ class EXTENSIONSYSTEM_EXPORT PluginDetailsView : public QWidget
 
 public:
     PluginDetailsView(QWidget *parent = 0);
-    ~PluginDetailsView();
+    ~PluginDetailsView() override;
 
     void update(PluginSpec *spec);
 

src/libs/extensionsystem/pluginerroroverview.h

@@ -45,7 +45,7 @@ class EXTENSIONSYSTEM_EXPORT PluginErrorOverview : public QDialog
 
 public:
     explicit PluginErrorOverview(QWidget *parent = 0);
-    ~PluginErrorOverview();
+    ~PluginErrorOverview() override;
 
 private:
     void showDetails(QListWidgetItem *item);

src/libs/extensionsystem/pluginerrorview.h

@@ -42,7 +42,7 @@ class EXTENSIONSYSTEM_EXPORT PluginErrorView : public QWidget
 
 public:
     PluginErrorView(QWidget *parent = 0);
-    ~PluginErrorView();
+    ~PluginErrorView() override;
 
     void update(PluginSpec *spec);
 

src/libs/extensionsystem/pluginmanager.h

@@ -50,7 +50,7 @@ public:
     static PluginManager *instance();
 
     PluginManager();
-    ~PluginManager();
+    ~PluginManager() override;
 
     // Object pool operations
     static void addObject(QObject *obj);

src/libs/extensionsystem/pluginview.h

@@ -49,7 +49,7 @@ class EXTENSIONSYSTEM_EXPORT PluginView : public QWidget
 
 public:
     explicit PluginView(QWidget *parent = 0);
-    ~PluginView();
+    ~PluginView() override;
 
     PluginSpec *currentPlugin() const;
     void setFilter(const QString &filter);