Change license for examples files

According to QUIP-18 [1], all examples file should be
LicenseRef-Qt-Commercial OR BSD-3-Clause

[1]: https://contribute.qt-project.org/quips/18

Task-number: QTBUG-121787
Change-Id: I185ebdff2faa5e4af6ac0ee77c3ae33faae06e7d
Reviewed-by: Kai Köhne <kai.koehne@qt.io>
(cherry picked from commit f45dffa8b4e5a3ddc3473203e27ebdeebfde10da)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/tools/qlalr/examples/dummy-xml/ll/dummy-xml-ll.cpp

@@ -1,5 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 #include <cstdlib>
 #include <cstdio>

src/tools/qlalr/examples/dummy-xml/xml.g

@@ -1,5 +1,5 @@
 -- Copyright (C) 2016 The Qt Company Ltd.
--- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+-- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 %parser XMLTable
 

src/tools/qlalr/examples/glsl/build.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # Copyright (C) 2016 The Qt Company Ltd.
-# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 ${FLEX-flex} -oglsl-lex.incl glsl-lex.l
 ${QLALR-qlalr} glsl.g

src/tools/qlalr/examples/glsl/glsl-lex.l

@@ -1,5 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 #include <cassert>
 #define YY_DECL int GLSLParser::nextToken()

src/tools/qlalr/examples/glsl/glsl.g

@@ -1,5 +1,5 @@
 -- Copyright (C) 2016 The Qt Company Ltd.
--- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+-- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 %parser GLSLParserTable
 %merged_output glsl.cpp

src/tools/qlalr/examples/lambda/lambda.g

@@ -1,5 +1,5 @@
 -- Copyright (C) 2016 The Qt Company Ltd.
--- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+-- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 -- lambda calculus
 

src/tools/qlalr/examples/lambda/main.cpp

@@ -1,5 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 #include "lambda.h"
 

src/tools/qlalr/examples/qparser/calc.g

@@ -1,5 +1,5 @@
 -- Copyright (C) 2016 The Qt Company Ltd.
--- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+-- SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 %parser calc_grammar
 %decl calc_parser.h

src/tools/qlalr/examples/qparser/calc.l

@@ -1,5 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 #include "calc_parser.h"
 #include <cstdlib>

src/tools/qlalr/examples/qparser/qparser.cpp

@@ -1,5 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 #include "qparser.h"
 

src/tools/qlalr/examples/qparser/qparser.h

@@ -1,5 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 #ifndef QPARSER_H
 #define QPARSER_H