[libcalamares] Warnings-- in tests (~T() override)

src/libcalamares/Tests.cpp

@@ -24,7 +24,7 @@ class TestLibCalamares : public QObject
     Q_OBJECT
 public:
     TestLibCalamares() {}
-    virtual ~TestLibCalamares() {}
+    ~TestLibCalamares() override {}
 
 private Q_SLOTS:
     void testGSModify();

src/libcalamares/modulesystem/Tests.cpp

@@ -20,7 +20,7 @@ class ModuleSystemTests : public QObject
     Q_OBJECT
 public:
     ModuleSystemTests() {}
-    virtual ~ModuleSystemTests() {}
+    ~ModuleSystemTests() override {}
 
 private Q_SLOTS:
     void initTestCase();

src/libcalamares/utils/TestPaths.cpp

@@ -26,7 +26,7 @@ class TestPaths : public QObject
     Q_OBJECT
 public:
     TestPaths() {}
-    virtual ~TestPaths() {}
+    ~TestPaths() override {}
 
 private Q_SLOTS:
     void initTestCase();