xfs/513: fix the regression caused by mount option uqnoenforce

xfs/513: fix the regression caused by mount option uqnoenforce

The mount options uqnoenforce and qnoenforce no longer cause 'usrquota'
to be emitted in /proc/mounts, so there is a regression in xfs/513. Fix
it by using proper output option uqnoenforce.

You'll need kernel commit 237d7887ae72 ("xfs: show the proper user
quota options") to pass the test.

[Eryu: add kernel commit info in commit log]

Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>