st/mesa: enable ARB_ES3_1_compatibility when ES 3.1 would be exposed

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>
diff --git a/docs/GL3.txt b/docs/GL3.txt
index 4a9cf0b..029fe5f 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -208,7 +208,7 @@
 
 GL 4.5, GLSL 4.50:
 
-  GL_ARB_ES3_1_compatibility                            not started
+  GL_ARB_ES3_1_compatibility                            DONE (nvc0, radeonsi)
   GL_ARB_clip_control                                   DONE (i965, nv50, nvc0, r600, radeonsi, llvmpipe, softpipe, swr)
   GL_ARB_conditional_render_inverted                    DONE (i965, nv50, nvc0, r600, radeonsi, llvmpipe, softpipe, swr)
   GL_ARB_cull_distance                                  DONE (i965, nv50, nvc0, llvmpipe, softpipe)