check: add brief result summaries

check: add brief result summaries

When running multiple sections and hundreds of tests in each config
section, it's hard to see what failed from the summary output
because of the hundreds of tests listed in the "tests run" and
"tests not run" output. Add a "-b" option for brief result summaries
that only output the tests that failed and the summary count of
tests failed.

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>