Move ruby-utils include to be before EXPORT_FUNCTIONS.

Fixes:
 * QA Notice: EXPORT_FUNCTIONS is called before inherit in
 * ruby-ng.eclass. For compatibility with <=portage-2.1.6.7, only call
 * EXPORT_FUNCTIONS after inherit(s).
Merge branch 'master' of git+ssh://git.overlays.gentoo.org/proj/ruby-overlay
[.travis.yml] Update