Add OWNERS for recipes/

$ git log --oneline --format='%aE' --since '12 months ago' recipes/ | sort | uniq

Bug:

R=dnj@chromium.org, nodir@chromium.org, phajdan.jr@chromium.org

Change-Id: I1c9213b9bc2cf20d117c4691190f18ea75bcaaef
Reviewed-on: https://chromium-review.googlesource.com/482541
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Nodir Turakulov <nodir@chromium.org>

recipes/OWNERS

+dnj@chromium.org
+phajdan.jr@chromium.org