xfs: update health status if we get a clean bill of health

xfs: update health status if we get a clean bill of health

Source kernel commit: a1f3e0cca41036c3c66abb6a2ed8fedc214e9a4c

If scrub finds that everything is ok with the filesystem, we need a way
to tell the health tracking that it can let go of indirect health flags,
since indirect flags only mean that at some point in the past we lost
some context.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>