[webrtc-pc] new commits pushed by aboba

The following commits were just pushed by aboba to https://github.com/w3c/webrtc-pc:

* fixes changes entry for #1038

copy-paste error probably
  by Philipp Hancke
https://github.com/w3c/webrtc-pc/commit/d20e00df22696242a86d856681fa97403fceb9ab

* Merge pull request #1837 from fippo/fix-changelog

editorial: fixes changes entry for #1038
  by Bernard Aboba
https://github.com/w3c/webrtc-pc/commit/b0dd3d58e54e48f4e3ed59dc1bfd4433ff4d3a30