xcb: eradicate Q_FOREACH loops

... and mark the library with QT_NO_FOREACH.

Change-Id: I4924f1419f470b5fa92bb2f3fdefa745b65957f7
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

src/plugins/platforms/xcb/qxcbmime.cpp

@@ -212,7 +212,7 @@ QVariant QXcbMime::mimeConvertToFormat(QXcbConnection *connection, xcb_atom_t a,
                 if (format == QLatin1String("text/uri-list")) {
                     const QStringList urls = str.split(QLatin1Char('\n'));
                     QList<QVariant> list;
-                    foreach (const QString &s, urls) {
+                    for (const QString &s : urls) {
                         const QUrl url(s.trimmed());
                         if (url.isValid())
                             list.append(url);

src/plugins/platforms/xcb/xcb_qpa_lib.pro

@@ -1,5 +1,6 @@
 TARGET     = QtXcbQpa
 CONFIG += no_module_headers internal_module
+DEFINES += QT_NO_FOREACH
 
 QT += core-private gui-private platformsupport-private