Add some other people to recipes/OWNERS

Change-Id: I554d1fd354e628d2e62629be7ce20e899364c4a9
Reviewed-on: https://chromium-review.googlesource.com/984972
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Daniel Jacques <dnj@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>