Add a root codereview.settings file.
Add a root codereview.settings file.

Chromium has one of these as well:
http://src.chromium.org/viewvc/chrome/codereview.settings

It's needed for drover reverts to work properly.

TBR=kjellander

Review URL: https://webrtc-codereview.appspot.com/1319014

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@3895 4adac7df-926f-26a2-2b94-8c16560cd09d

mwgoldsmith/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,mwgoldsmith/libilbc,mwgoldsmith/ilbc,mwgoldsmith/ilbc,mwgoldsmith/ilbc,TimothyGu/libilbc,mwgoldsmith/libilbc,ShiftMediaProject/libilbc,mwgoldsmith/ilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,mwgoldsmith/libilbc,ShiftMediaProject/libilbc