xfs/266: fix restore summary counter when quotas are enabled

xfs/266: fix restore summary counter when quotas are enabled

When quotas are enabled, an incremental backup has to record the quota
file updates too.  Inside a dump the quota files are stored as special
files under the root dump directory.  xfsrestore reports the dump dir
in its restore summary counts even if the dump dir was only there for
the sake of the quota updates, which makes the test fail.  Fix this by
massaging the output when quotas are turned on.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>