Add a TSAN suppression for a benign TRACE_EVENT race.

TBR=hclam
BUG=3409

Review URL: https://webrtc-codereview.appspot.com/15639004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6293 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/tools/valgrind-webrtc/tsan/suppressions.txt b/tools/valgrind-webrtc/tsan/suppressions.txt
index ed344ad..c1fa5a9 100644
--- a/tools/valgrind-webrtc/tsan/suppressions.txt
+++ b/tools/valgrind-webrtc/tsan/suppressions.txt
@@ -542,6 +542,13 @@
   fun:webrtc::VideoEngine::SetTraceFilter
   ...
 }
+{
+  Benign TRACE_EVENT race (webrtc:3409)
+  ThreadSanitizer:Race
+  fun:webrtc::RTCPReceiver::HandleSenderReceiverReport
+  fun:webrtc::RTCPReceiver::IncomingRTCPPacket
+  ...
+}
 
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 # 2. libjingle stuff (talk folder)