gettext security and bug fix update

0.19.8.1-3 - fix CVE-2018-18751: double-free in xgettext rhbz1648433...

gettext security update

0.19.8.1-17 - Ported CI gating tests to Python 3.6 0.19.8.1-16 - add CI gating tests 0.19.8.1-15 - fix CVE-2018-18751: double-free in xgettext rhbz1647049...