chamelium: Debug-print CRCs when comparing them and dumping frames

Add debug prints for the reference and captured CRCs when comparing them
and dumping them, which can be useful to get an idea of what is going on
(e.g. specific noise on display cables often only changes one of the
values that compose the CRC).

It's also useful to associate a test debug output with the dumped
pictures (that have the CRC in their name).

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

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