add SPDX identifier for files under the LGPL-3+ license

Scripts/developer_scripts/check_licenses

@@ -20,6 +20,7 @@
 #
 # $URL$
 # $Id$
+# SPDX-License-Identifier: LGPL-3.0+
 #
 # Author(s)     : Joachim Reichel <joachim.reichel@gmx.de>
 #                 Laurent Rineau

Scripts/developer_scripts/create_internal_release

@@ -281,6 +281,8 @@ sub create_version_file()
 // This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 // WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 //
+// SPDX-License-Identifier: LGPL-3.0+
+//
 // Author(s)     : -
 
 // This file is automatically created by create_internal_release.

Scripts/developer_scripts/list_cgal_includes

@@ -19,6 +19,7 @@
 #
 # $URL$
 # $Id$
+# SPDX-License-Identifier: LGPL-3.0+
 #
 # Author(s)     : 
 

Scripts/developer_scripts/test_license_check/ImageIO.h

@@ -16,6 +16,8 @@
 // $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/releases/CGAL-4.1-branch/CGALimageIO/include/CGAL/ImageIO.h $
 // $Id: ImageIO.h 67097 2012-01-13 13:36:56Z lrineau $
 //
+// SPDX-License-Identifier: LGPL-3.0+
+//
 
 #ifndef IMAGEIO_H
 #define IMAGEIO_H

Scripts/developer_scripts/test_license_check/test-lgpl.h

@@ -16,3 +16,5 @@
 // This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 // WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 //
+// SPDX-License-Identifier: LGPL-3.0+
+//