xfs_repair: print better information when metadata updates fail

xfs_repair: print better information when metadata updates fail

If a metadata update fails during phase 6, we should print an error
message that can be traced back to a specific line of code.  Also,
res_failed spits out a general message about "xfs_trans_reserve failed",
which is probably not where the failure happened.  Fix two incorrect
call sites.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>