xfs/288: use -d option of xfs_db write command for v5 XFS

The commit b3cf8b7233 update xfs/288
to support v5 filesystem testing. That commit thought xfs_db write
command can work well with -d option on V5 XFS. But the truth is the
case doesn't use that option.

So turn to use _scratch_xfs_set_metadata_field, it will help to use
proper options for xfs_db write command.

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

tests/xfs/288

@@ -56,9 +56,8 @@ $SETFATTR_PROG -n "user.testattr${seq}" \
 
 _scratch_unmount
 # manually corrupt the XFS, by set the header count of attr to 0
-_scratch_xfs_db -x -c "inode $inum" \
-		   -c "ablock 0" \
-		   -c "write hdr.count 0" >> $seqres.full
+_scratch_xfs_set_metadata_field "hdr.count" "0" \
+				"inode $inum" "ablock 0" >> $seqres.full
 
 # make sure xfs_repair can find above corruption. If it can't, that
 # means we need to fix this bug on current xfs_repair