QmlDesigner: Fix the build error for CollectionImportTools

Change-Id: I946df14af3e4425203ea7ea04807205442c3119d
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Qt CI Patch Build Bot <ci_patchbuild_bot@qt.io>

src/plugins/qmldesigner/components/collectioneditor/collectionimporttools.h

@@ -3,6 +3,8 @@
 
 #pragma once
 
+#include <QtCore/qtconfigmacros.h>
+
 QT_BEGIN_NAMESPACE
 class QJsonArray;
 class QUrl;