SubversionClient: Use Qt5 style connect

Change-Id: I88f1de02edcb6c4406de64745ccc4cfc85f3d562
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/subversion/subversionclient.cpp

@@ -234,8 +234,7 @@ void DiffController::postCollectTextualDiffOutput()
 {
     auto command = new VcsCommand(m_workingDirectory, processEnvironment());
     command->setCodec(EditorManager::defaultTextCodec());
-    connect(command, SIGNAL(output(QString)),
-            this, SLOT(slotTextualDiffOutputReceived(QString)));
+    connect(command, &VcsCommand::output, this, &DiffController::slotTextualDiffOutputReceived);
 //    command->addFlags(diffExecutionFlags());
 
     QStringList args;