Use @webrtc.org addresses for OWNERS.

Fixes talk/app/webrtc/OWNERS and removes houssainy@google.com from
webrtc/tools/rtcbot/OWNERS.

BUG=
R=andresp@webrtc.org, perkj@webrtc.org

Review URL: https://codereview.webrtc.org/1505613004 .

Cr-Commit-Position: refs/heads/master@{#10918}

talk/app/webrtc/OWNERS

diff --git a/talk/app/webrtc/OWNERS b/talk/app/webrtc/OWNERS
index ffd78e1..20a1fdf 100644
--- a/talk/app/webrtc/OWNERS
+++ b/talk/app/webrtc/OWNERS
@@ -1,5 +1,5 @@
 glaznev@webrtc.org
-juberti@google.com
-perkj@google.com
+juberti@webrtc.org
+perkj@webrtc.org
 tkchin@webrtc.org
-tommi@google.com
+tommi@webrtc.org

webrtc/tools/rtcbot/OWNERS

diff --git a/webrtc/tools/rtcbot/OWNERS b/webrtc/tools/rtcbot/OWNERS
index efdce51..296f71f 100644
--- a/webrtc/tools/rtcbot/OWNERS
+++ b/webrtc/tools/rtcbot/OWNERS
@@ -1,2 +1 @@
 andresp@webrtc.org
-houssainy@google.com