i965/gen7: expose OpenGL 4.2 on Haswell when supported

GL_ARB_vertex_attrib_64bit was the last piece missing.

v2: update docs (Jordan)

Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
diff --git a/docs/relnotes/17.0.0.html b/docs/relnotes/17.0.0.html
index bd397d2..b50f9e9 100644
--- a/docs/relnotes/17.0.0.html
+++ b/docs/relnotes/17.0.0.html
@@ -50,7 +50,7 @@
 <li>GL_ARB_gpu_shader_fp64 in i965/haswell</li>
 <li>GL_ARB_vertex_attrib_64bit in i965/haswell</li>
 <li>GL_ARB_shader_precision in i965/haswell</li>
-<li>Intel Haswell now supports OpenGL 4.0</li>
+<li>Intel Haswell now supports OpenGL 4.2</li>
 <li>GL_OES_geometry_shader on i965/haswell</li>
 <li>GL_OES_texture_cube_map_array on i965/haswell</li>
 <li>GL_OES_viewport_array on i965/haswell</li>