Libmount: Fix removal of "owner" option when executed as root

Libmount: Fix removal of "owner" option when executed as root

When executed as root, libmount replaces the "owner" and "group" mount
options with "nosuid, nodev, ..." However, this can result in an
"invalid argument" error because libmount removes the unwanted options
first and then tries to address the location for the new options using
the already removed options. To fix this, we need to reverse the order
of operations.

Reported-by: hxinzhe <hxinzhe1024@163.com>
Signed-off-by: Karel Zak <kzak@redhat.com>