docs: add ARB_draw_indirect to ES 3.1 list

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
diff --git a/docs/GL3.txt b/docs/GL3.txt
index 1469e14..6cb40ed 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -212,6 +212,7 @@
 GLES3.1, GLSL ES 3.1
   GL_ARB_arrays_of_arrays                              started (Timothy)
   GL_ARB_compute_shader                                in progress (jljusten)
+  GL_ARB_draw_indirect                                 DONE (i965, nvc0, radeonsi, llvmpipe, softpipe)
   GL_ARB_explicit_uniform_location                     DONE (all drivers that support GLSL)
   GL_ARB_framebuffer_no_attachments                    not started
   GL_ARB_program_interface_query                       not started