[x11-misc/virtualgl] sync with portage ebuild
[x11-misc/virtualgl] move fakelibs to a sane location
[x11-misc/virtualgl] remove manifest
[x11-misc/bumblebee] do not require xdm/vgl services
[x11-misc/bumblebee] remove old ebuild, remove manifest
[x11-misc/bumblebee] sync with portage ebuild
[x11-misc/primus] use multilib-build.eclass