i965: Enable GL_OES_geometry_shader on Gen8+

Gen7 can get this extension (and GL_OES_shader_io_blocks) as soon as the
rest of OpenGL ES 3.1 is enabled.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
3 files changed