util-linux: fix CVE-2014-9114

Backport a patch to fix CVE-2014-9114.
The patch has been integrated in util-linux-2.26.

[YOCTO #7180]

Hand applied do to version differencses.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>