docs: Mark off ARB_derivative_control for i965.

Also update 10.3 relnotes to match.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>

docs/GL3.txt

@@ -188,7 +188,7 @@ GL 4.5, GLSL 4.50:
   GL_ARB_clip_control                                  not started
   GL_ARB_conditional_render_inverted                   not started
   GL_ARB_cull_distance                                 not started
-  GL_ARB_derivative_control                            DONE (nv50, nvc0)
+  GL_ARB_derivative_control                            DONE (i965, nv50, nvc0)
   GL_ARB_direct_state_access                           not started
   GL_ARB_get_texture_sub_image                         started (Brian Paul)
   GL_ARB_shader_texture_image_samples                  not started

docs/relnotes/10.3.html

@@ -47,7 +47,7 @@ Note: some of the new features are only available with certain drivers.
 <li>GL_ARB_ES3_compatibility on nv50, nvc0, r600, radeonsi, softpipe, llvmpipe</li>
 <li>GL_ARB_clear_texture on i965</li>
 <li>GL_ARB_compressed_texture_pixel_storage on all drivers</li>
-<li>GL_ARB_derivative_control on nv50, nvc0</li>
+<li>GL_ARB_derivative_control on i965, nv50, nvc0</li>
 <li>GL_ARB_draw_indirect on nvc0, radeonsi</li>
 <li>GL_ARB_explicit_uniform_location (all drivers that support GLSL)</li>
 <li>GL_ARB_fragment_layer_viewport on nv50, nvc0, llvmpipe, r600</li>