Add tokens for EGL_EXT_image_dma_buf_import_modifiers

Extension bug:

  https://cvs.khronos.org/bugzilla/show_bug.cgi?id=16036

Introspection entry points in spec are work in progress, but the tokens
are allocated and final.

BUG=chrome-os-partner:56407

Change-Id: I690ae770df5eb08d976ffa6a5e0cb576d5e3319a
Reviewed-on: https://chromium-review.googlesource.com/387178
Reviewed-by: Ray Smith <Raymond.Smith@arm.com>
Reviewed-by: Stphane Marchesin <marcheu@chromium.org>
Tested-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Trybot-Ready: Kristian H. Kristensen <hoegsberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/397841
Commit-Ready: Kristian H. Kristensen <hoegsberg@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
1 file changed