docs: document that GL_ARB_get_texture_sub_image is completed

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
diff --git a/docs/GL3.txt b/docs/GL3.txt
index 33a282e..2144257 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -202,7 +202,7 @@
   - Sampler object                                     DONE
   - Program Pipeline object                            DONE
   - Query object                                       DONE (will require changes when GL_ARB_query_buffer_object lands)
-  GL_ARB_get_texture_sub_image                         started (Brian Paul)
+  GL_ARB_get_texture_sub_image                         DONE (all drivers)
   GL_ARB_shader_texture_image_samples                  not started
   GL_ARB_texture_barrier                               DONE (nv50, nvc0, r600, radeonsi)
   GL_KHR_context_flush_control                         DONE (all - but needs GLX/EXT extension to be useful)
diff --git a/docs/relnotes/10.7.0.html b/docs/relnotes/10.7.0.html
index 42ea807..f39e272 100644
--- a/docs/relnotes/10.7.0.html
+++ b/docs/relnotes/10.7.0.html
@@ -47,6 +47,7 @@
 <li>GL_AMD_vertex_shader_viewport_index on radeonsi</li>
 <li>GL_ARB_fragment_layer_viewport on radeonsi</li>
 <li>GL_ARB_framebuffer_no_attachments on i965</li>
+<li>GL_ARB_get_texture_sub_image for all drivers</li>
 <li>GL_ARB_gpu_shader_fp64 on llvmpipe, radeonsi</li>
 <li>GL_ARB_shader_stencil_export on llvmpipe</li>
 <li>GL_ARB_vertex_attrib_64bit on llvmpipe, radeonsi</li>