Add kinuko@ and sammc@ as IPC security reviwers.

Change-Id: I2d92f39a18b79fa543e047d8c133f5557ce35b6b
Reviewed-on: https://chromium-review.googlesource.com/842248Reviewed-by: Chris Palmer <palmer@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#527040}

ipc/SECURITY_OWNERS

@@ -10,6 +10,7 @@ dcheng@chromium.org
 estark@chromium.org
 kenrb@chromium.org
 kerrnel@chromium.org
+kinuko@chromium.org
 meacer@chromium.org
 mbarbella@chromium.org
 mkwst@chromium.org
@@ -17,5 +18,6 @@ nasko@chromium.org
 ochang@chromium.org
 palmer@chromium.org
 rsesek@chromium.org
+sammc@chromium.org
 tsepez@chromium.org
 wfh@chromium.org