Make pbos and kjellander only owners of tsan2 suppressions.
Make pbos and kjellander only owners of tsan2 suppressions.

R=pbos@webrtc.org
TBR=kjellander@webrtc.org
BUG=N/A

Review URL: https://webrtc-codereview.appspot.com/29709004

git-svn-id: 03ae4fbe531b1eefc9d815f31e49022782c42458@7412 4adac7df-926f-26a2-2b94-8c16560cd09d

svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758