Use QFileInfo::exist(f) instead of QFileInfo(f).exists() if possible

Faster.

Change-Id: I91aa67462e11ff3258600d7f158de79942d0dc81
Reviewed-by: Marc Reilly <marc.reilly@gmail.com>
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/ios/iosrunner.cpp

@@ -117,7 +117,7 @@ void IosRunner::start()
     }
     m_cleanExit = false;
     m_qmlPort = 0;
-    if (!QFileInfo(m_bundleDir).exists()) {
+    if (!QFileInfo::exists(m_bundleDir)) {
         TaskHub::addTask(Task::Warning,
                          tr("Could not find %1.").arg(m_bundleDir),
                          ProjectExplorer::Constants::TASK_CATEGORY_DEPLOYMENT);