xwayland: Create scanout capable BO
Before linux_dmabuf v4 support was added, the BO were created using gbm_bo_create_with_modifiers() which incidentally creates scanout capable buffers.
We now need to replicate that explicitly when using the fallback path, otherwise direct scanout will not be possible in that case.
Signed-off-by: Olivier Fourdan ofourdan@redhat.com
Closes: #1535 (closed)
Suggested-by: Michel Dänzer mdaenzer@redhat.com