Force system-libevent use flag on mozilla packages, since the building of
bundled libevent cannot accomodate a system without sysctl.h
Bug: https://bugs.gentoo.org/574830
--- /dev/null
+# Copyright 1999-2015 Gentoo Foundation.
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+# Force system-libevent use flag on mozilla packages, since the building of
+# bundled libevent cannot accomodate a system without sysctl.h
+# See bug 574830 for more info.
+>=www-client/firefox-45.0 system-libevent
+>=www-client/seamonkey-2.40 system-libevent
+>=mail-client/thunderbird-45.0 system-libevent