wayland-info: Add support for linux_dmabuf version 4

This version changes how formats and modifiers are sent to the client,
which now has to mmap() a file descriptor to get the list of
known formats, and then receives the preferred formats in tranches, from
best to worst.

We keep the deprecated version 3 handling, for legacy compositors.

Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>