Fix build without features.itemmodel

The macro needed to avoid generating headers_*.o from the header files.

Change-Id: I4fc5ec2432661493e337e1779d79373dedff0132
Reviewed-by: David Faure <david.faure@kdab.com>

src/corelib/itemmodels/qconcatenatetablesproxymodel.h

@@ -42,6 +42,8 @@
 
 #include <QtCore/qabstractitemmodel.h>
 
+QT_REQUIRE_CONFIG(concatenatetablesproxymodel);
+
 QT_BEGIN_NAMESPACE
 
 class QConcatenateTablesProxyModelPrivate;

src/corelib/itemmodels/qtransposeproxymodel.h

@@ -43,6 +43,8 @@
 #include <QtCore/qabstractproxymodel.h>
 #include <QtCore/qscopedpointer.h>
 
+QT_REQUIRE_CONFIG(transposeproxymodel);
+
 QT_BEGIN_NAMESPACE
 
 class QTransposeProxyModelPrivate;