Check if xfs quota is available

Define HAVE_XFS_QUOTA to show if xfs quota is available.

Signed-off-by: DAN LI <li.dan@cn.fujitsu.com>
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
quotactl/quotactl02.c: create a case to test basic flags of quotactl(2)

Test basic xqm-related flags of quotactl() syscall.

Signed-off-by: DAN LI <li.dan@cn.fujitsu.com>