Add Christophe Dumez to AUTHORS.

Copied from Chromium's AUTHORS.

R=ch.dumez@samsung.com

Review URL: https://webrtc-codereview.appspot.com/5559004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5341 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/AUTHORS b/AUTHORS
index 741c7fd..f92a9bf 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -3,6 +3,7 @@
 
 Anil Kumar <an1kumar@gmail.com>
 Ben Strong <bstrong@gmail.com>
+Christophe Dumez <ch.dumez@samsung.com>
 Eric Rescorla, RTFM Inc.
 Jie Mao <maojie0924@gmail.com>
 Luke Weber