qml2puppet: fix include when building against linux Qt5

Change-Id: I17401443a1e099b9c63d0de2e6f8bf5c3e9cfcb3
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/tools/qml2puppet/qml2puppet/iconrenderer/iconrenderer.h

@@ -6,6 +6,8 @@
 #include <QtCore/qobject.h>
 #include <QtCore/qstring.h>
 
+#include <memory>
+
 QT_BEGIN_NAMESPACE
 class QQuickWindow;
 class QQuickItem;