wpe-simple-launcher: Apply GL sink regression workaround conditionally

... just for raspberrypi5

Change-Type: minor

Author: psaavedra

recipes-browser/wpe-simple-launcher/wpe-simple-launcher/wpe-exported-wayland

@@ -25,7 +25,11 @@ export WEBKIT_GST_DMABUF_SINK_DISABLED=false
 #   [GStreamer] Add support for DMA-BUF to GL video sink
 #   https://bugs.webkit.org/show_bug.cgi?id=279672
 # XXX Reported in : https://bugs.webkit.org/show_bug.cgi?id=288464
-export WEBKIT_GST_DISABLE_GL_SINK=1
+#
+# Apply regression workaround only if running on raspberrypi5
+if [ "$(hostname)" = "raspberrypi5" ]; then
+    export WEBKIT_GST_DISABLE_GL_SINK=1
+fi
 
 # Ensure Wayland and XDG runtime environment variables are propagated
 WAYLAND_DISPLAY=$(strings < "/proc/$(pidof weston-keyboard)/environ" | grep WAYLAND_DISPLAY)