Merge third_party/libjingle/source/talk from https://chromium.googlesource.com/external/webrtc/stable/talk.git at 3ca2c3528853f8a25fe42f0e998596ea5ce1f33d

This commit was generated by merge_from_chromium.py.

Change-Id: I7edab45f36c7e6c7552d6a087962d51af013f207