Bump to version 39
Bump to version 39

TBR=niklas.enbom

Review URL: https://webrtc-codereview.appspot.com/24749004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 61e811faa0a5b07d150babe9b144583e5d0c6fff

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc