config: add x11proto dependency for libxau and SDDM

- Add x11proto to redbear-full.toml package list
- libxau recipe updated with x11proto dependency and custom build script
- Fixes libxau build failure: 'Package xproto was not found'

local/recipes/qt/qtbase/source/examples/sql/querymodel/customsqlmodel.h

@@ -0,0 +1,21 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef CUSTOMSQLMODEL_H
+#define CUSTOMSQLMODEL_H
+
+#include <QSqlQueryModel>
+
+//! [0]
+class CustomSqlModel : public QSqlQueryModel
+{
+    Q_OBJECT
+
+public:
+    CustomSqlModel(QObject *parent = nullptr);
+
+    QVariant data(const QModelIndex &item, int role) const override;
+};
+//! [0]
+
+#endif