Add option to bwe_rtp_to_text to output arrival times only in nanoseconds.

R=andresp@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/9459004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5665 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed