net-libs/rb_libtorrent: revbump with several fixes and improvements

net-libs/rb_libtorrent: revbump with several fixes and improvements

  * add libressl support (bug 574004)
  * use official "prepared" tarball, saves eautoreconf call (bug 577288)
  * link python bindings against the just-built library (bug 578026)
  * backport patch for CVE-2016-5301 (bug 585278)
  * add subslot
  * use system copy of geoip library and allow disabling it via USE flag
  * drop some obsolete/redundant options from econf invocation
  * revise which logging options are turned on by USE=debug
  * fix and unrestrict tests
  * don't install .la file when not needed

Package-Manager: portage-2.3.0