common/xfs: compress online repair rebuild output by default

common/xfs: compress online repair rebuild output by default

Force-repairing the filesystem after a test can fill up /tmp with quite
a lot of logging message.  We don't have a better place to stash that
output in case the scrub fails and we need to analyze it later, so
compress it with gzip and only decompress it later.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Andrey Albershteyn <aalbersh@redhat.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>