Add compatibility shims to libsrtp for v1->v2 transition

This essentially creates libsrtp 1.9, with #defines to allow both 'identifier' and 'srtp_identifier' for the symbols used by WebRTC. Then we can change WebRTC to use the new symbols and replace this with libsrtp 2.0.

Add an OWNERS file.

BUG=webrtc:6376
R=kjellander@chromium.org, phoglund@chromium.org

Review URL: https://codereview.chromium.org/2346813003 .
4 files changed