Remove talk_base from suppressions.

This namespace doesn't exist anymore, so remove all suppressions that
include it in the call stack.

R=kjellander@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/31639005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7419 4adac7df-926f-26a2-2b94-8c16560cd09d