Add Andreas Sturmlechner's LOo-4.3.1.2 ebuild

Add the ebuild posted to bug 518664 (
https://bugs.gentoo.org/show_bug.cgi?id=518664 ) by Andreas
Sturmlechner, along with his patches against the 4.3.1.2 release
tarball.

All code is copyright 2014 Andreas Sturmlechner (
andreas.sturmlechner@gmail.com ), and distributed under the GPL-2
license ( http://www.gnu.org/licenses/gpl-2.0-standalone.html ).