xfs: enable the needsrepair feature

Make it so that libxfs recognizes the needsrepair feature.  Note that
the kernel will still refuse to mount these.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

Author: djwong

fs/xfs/libxfs/xfs_format.h

@@ -473,7 +473,8 @@ xfs_sb_has_ro_compat_feature(
 		(XFS_SB_FEAT_INCOMPAT_FTYPE|	\
 		 XFS_SB_FEAT_INCOMPAT_SPINODES|	\
 		 XFS_SB_FEAT_INCOMPAT_META_UUID| \
-		 XFS_SB_FEAT_INCOMPAT_BIGTIME)
+		 XFS_SB_FEAT_INCOMPAT_BIGTIME| \
+		 XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR)
 
 #define XFS_SB_FEAT_INCOMPAT_UNKNOWN	~XFS_SB_FEAT_INCOMPAT_ALL
 static inline bool