Mark security header for the qt labs sharedimage

The image loader (QuickSharedImageLoader) uses shared memory
(QSharedMemory) but it shouldn't trigger security issue from the
framework itself.

QUIP: 23
Task-number: QTBUG-136184
Pick-to: 6.10 6.8
Change-Id: Ie0c5f63e3c7d4c8557dab8c12af412fd6dad1464
Reviewed-by: Oliver Eftevaag <oliver.eftevaag@qt.io>

src/labs/sharedimage/qsharedimageloader.cpp

@@ -1,5 +1,6 @@
 // Copyright (C) 2017 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:significant reason:default
 
 #include "qsharedimageloader_p.h"
 #include <private/qobject_p.h>

src/labs/sharedimage/qsharedimageloader_p.h

@@ -1,5 +1,6 @@
 // Copyright (C) 2017 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:significant reason:default
 
 #ifndef QSHAREDIMAGELOADER_H
 #define QSHAREDIMAGELOADER_H

src/labs/sharedimage/qsharedimageprovider.cpp

@@ -1,5 +1,6 @@
 // Copyright (C) 2017 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:significant reason:default
 
 #include <qsharedimageprovider_p.h>
 #include <private/qquickpixmap_p.h>

src/labs/sharedimage/qsharedimageprovider_p.h

@@ -1,5 +1,6 @@
 // Copyright (C) 2017 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:significant reason:default
 
 #ifndef QSHAREDIMAGEPROVIDER_H
 #define QSHAREDIMAGEPROVIDER_H

src/labs/sharedimage/qtlabssharedimageglobal_p.h

@@ -1,5 +1,6 @@
 // Copyright (C) 2021 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:insignificant
 
 #ifndef QTLABSSHAREDIMAGEGLOBAL_P_H
 #define QTLABSSHAREDIMAGEGLOBAL_P_H