OWNERS: Add people from Pigweed

This would make it easier to get in changes like
http://pwrev.dev/203310.

Change-Id: I8b286374da6ee08b003f828e41bbb759eec2f49d
Reviewed-on: https://pigweed-review.googlesource.com/c/open-dice/+/203615
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Reviewed-by: Darren Krahn <dkrahn@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/OWNERS b/OWNERS
index 58d8a6a..40781bd 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,4 +1,14 @@
+amontanez@google.com
 ascull@google.com
+cramertj@google.com
 dkrahn@google.com
+frolv@google.com
+hayala@google.com
+hepler@google.com
+keir@google.com
+konkers@google.com
 mohrr@google.com
 pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com
+prabhukr@google.com
+tonymd@google.com
+tpudlik@google.com