xfs/030: ignore lost rmapbt blocks

When we destroy the AG0 headers, we also lose track of the rmapbt
blocks, which causes xfs_repair to complain about their unconnectedness.
Filter out the error message from the output.

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

tests/xfs/030

@@ -60,7 +60,8 @@ _check_ag()
 			    -e '/^bad agbno AGBNO for finobt/d' \
 			    -e '/^bad agbno AGBNO for rmapbt/d' \
 			    -e '/^bad agbno AGBNO for refcntbt/d' \
-			    -e '/^Missing reverse-mapping record.*/d'
+			    -e '/^Missing reverse-mapping record.*/d' \
+			    -e '/^unknown block state, ag 0, block.*/d'
 	done
 }