Show client side debug information in debug builds

Eases the debugging in debug builds. In release no additional
information is shown.

Change-Id: I14b4a60235a0ca38e1350725e99242c456fdb290
Reviewed-by: Edward Welbourne <[email protected]>

Author: jsfdez

src/plugins/platforms/webgl/qwebglwebsocketserver.cpp

@@ -286,6 +286,14 @@ void QWebGLWebSocketServer::onNewConnection()
                 &QWebGLWebSocketServer::onTextMessageReceived);
 
         const QVariantMap values{
+            {
+                QStringLiteral("debug"),
+#ifdef QT_DEBUG
+                true
+#else
+                false
+#endif
+            },
             { "sysinfo",
                 QVariantMap {
                     { QStringLiteral("buildAbi"), QSysInfo::buildAbi() },