[webrtc-pc] new commits pushed by alvestrand

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

* Note that ICE transport state can go to completed

without visiting "connected".

Fixes #2316
  by Harald Alvestrand
https://github.com/w3c/webrtc-pc/commit/11436ad9f16835a56db004a02a79d880b1dc989f

* Removed extra /p
  by Harald Alvestrand
https://github.com/w3c/webrtc-pc/commit/7ad4299bb4e969323505fa6317fa7685e87b5db0

* Merge pull request #2376 from w3c/checking-completed-2316

Note that ICE transport state can go to completed
  by Harald Alvestrand
https://github.com/w3c/webrtc-pc/commit/5cbd3ed7f3cb61993446fb6dee2cbbc5c36fedd1