This is a bit academic as building with wayland without opengl
should be uncommon: still, libepoxy needs opengl so we shouldn't
depend on it without opengl.
(From OE-Core rev: 38d4672ee9fe2d9ef341875434562be8bca7d9bb)
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>