Also iOS config.
These are copied from client.webrtc.
Bug: chromium:767505
Change-Id: I48091cd27e8e2f10dcc3ba6105c49442c59d1b36
Reviewed-on: https://webrtc-review.googlesource.com/13121
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20338}