[webrtc-pc] new commits pushed by alvestrand

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

* Label 'Warm-up example' as 'advanced p2p example'
  by Adam Bergkvist
https://github.com/w3c/webrtc-pc/commit/211acba1281148da04ddb7a8ce5aa6fd61829037

* Merge pull request #1041 from w3c/classify-examples

Label 'Warm-up example' as 'advanced p2p example'
  by Harald Alvestrand
https://github.com/w3c/webrtc-pc/commit/a214d73b3cd78a87238933db6a2f0ed4f6382ed9