docs: Mark ARB_shader_image_load_store as done on i965.

docs/GL3.txt

@@ -139,7 +139,7 @@ GL 4.2, GLSL 4.20:
   GL_ARB_texture_storage                               DONE (all drivers)
   GL_ARB_transform_feedback_instanced                  DONE (i965, nv50, nvc0, r600, radeonsi, llvmpipe, softpipe)
   GL_ARB_base_instance                                 DONE (i965, nv50, nvc0, r600, radeonsi, llvmpipe, softpipe)
-  GL_ARB_shader_image_load_store                       in progress (curro)
+  GL_ARB_shader_image_load_store                       DONE (i965)
   GL_ARB_conservative_depth                            DONE (all drivers that support GLSL 1.30)
   GL_ARB_shading_language_420pack                      DONE (all drivers that support GLSL 1.30)
   GL_ARB_shading_language_packing                      DONE (all drivers)

docs/relnotes/11.0.0.html

@@ -52,6 +52,7 @@ Note: some of the new features are only available with certain drivers.
 <li>GL_ARB_get_texture_sub_image for all drivers</li>
 <li>GL_ARB_gpu_shader5 on radeonsi</li>
 <li>GL_ARB_gpu_shader_fp64 on llvmpipe, radeonsi</li>
+<li>GL_ARB_shader_image_load_store on i965</li>
 <li>GL_ARB_shader_stencil_export on llvmpipe</li>
 <li>GL_ARB_shader_subroutine on core profile all drivers</li>
 <li>GL_ARB_tessellation_shader on nvc0, radeonsi</li>