QVector: make sure the forwarding headers for the Java iterators exist

They used to in Qt 5. And now they do again:

 $ grep . include/QtCore/Q*Vector*
 include/QtCore/QMutableVectorIterator:#include "qvector.h"
 include/QtCore/QVector:#include "qvector.h"
 include/QtCore/QVectorIterator:#include "qvector.h"

Pick-to: 6.2 6.3
Fixes: QTBUG-103742
Change-Id: I77c8221eb2824c369feffffd16f128a983f4866c
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

src/corelib/tools/qvector.h

@@ -7,6 +7,12 @@
 #include <QtCore/qlist.h>
 #include <QtCore/qcontainerfwd.h>
 
+#if 0
+#pragma qt_class(QVector)
+#pragma qt_class(QMutableVectorIterator)
+#pragma qt_class(QVectorIterator)
+#endif
+
 QT_BEGIN_NAMESPACE
 
 #if !defined(QT_NO_JAVA_STYLE_ITERATORS)

sync.profile

@@ -45,7 +45,6 @@
     "qconfig.h" => "QtConfig",
     "qplugin.h" => "QtPlugin",
     "qalgorithms.h" => "QtAlgorithms",
-    "qvector.h" => "QVector",
     "qcontainerfwd.h" => "QtContainerFwd",
     "qdebug.h" => "QtDebug",
     "qevent.h" => "QtEvents",