icoutils security update

0.31.3-1 - Rebase to upstream version 0.31.3. - This version includes multiple security fixes CVE-2017-5208, CVE-2017-5333, CVE-2017-5332, CVE-2017-6009, CVE-2017-6010, CVE-2017-6011 resolves: rhbz1430610...