net-libs/gupnp-igd: bump to 0.2.5, remove oldstyle python bindings, other overhaul

net-libs/gupnp-igd: bump to 0.2.5, remove oldstyle python bindings, other overhaul

Upstream bump just switches to no-templates gtk-doc pregenerated docs, so take the
opportunity to overhaul the ebuild:

* Disable python bindings completely. Nothing in-tree needs those, and they are against
old pygobject. People should just use the introspection bindings via new pygobject.
Additionally unsure if they were even working before, the eautoreconf for shared linking
python modules had gotten lost long ago from migration away from autotools-utils.eclass.
* Fix LICENSE to LGPL-2.1+
* Use ltprune.eclass instead of full eutils.eclass for prune_libtool_files
* EAPI-6 port

Package-Manager: Portage-2.3.19, Repoman-2.3.6