nvme/012 & 013: avoid extremely slow xfs IO

nvme/012 & 013: avoid extremely slow xfs IO

It is observed that nvme/012 may take ~17 minutes to complete on aarch64,
even worse it may trigger IO timeout on nvme-loop.

Eric and Dave replied that it is because of too small log size on small
disk.

So pass '-l size=32m' to avoid the issue.

With this patch, nvme/012 can be completed in one minute.

Cc: Eric Sandeen <esandeen@redhat.com>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: linux-xfs@vger.kernel.org
Signed-off-by: Ming Lei <ming.lei@redhat.com>