Temporary workaround while waiting for upstream's fix.

https://bugreports.qt.io/browse/QTBUG-127484
--- a/cmake/FindGStreamer.cmake
+++ b/cmake/FindGStreamer.cmake
@@ -163,5 +163,5 @@
         HEADER gst/gl/x11/gstgldisplay_x11.h
         LIBRARY gstgl-1.0
-        DEPENDENCIES GStreamer::Video GStreamer::Base GStreamer::Core GStreamer::Gl XCB::XCB )
+        DEPENDENCIES GStreamer::Video GStreamer::Base GStreamer::Core GStreamer::Gl )
 endif()
 
@@ -171,5 +171,5 @@
         HEADER gst/gl/wayland/gstgldisplay_wayland.h
         LIBRARY gstgl-1.0
-        DEPENDENCIES GStreamer::Video GStreamer::Base GStreamer::Core GStreamer::Gl Wayland::Client )
+        DEPENDENCIES GStreamer::Video GStreamer::Base GStreamer::Core GStreamer::Gl )
 endif()
 
