The part "driver: skipped/failed, reference: passed" didn't add any
information, but used up space on the screen and made the output
slightly harder to parse.
OTOH, now that we have multiple analyze_vs_reference tasks, we
should print out which one we're doing, so that that output makes sense
in case of a failure on the CI (which runs all tasks).
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>