xfs: test upgrading filesystem to bigtime

Test that we can upgrade an existing filesystem to use bigtime.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>	(xfs/908 only)
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
6 files changed