Upgrade libsrtp to version 2.0
Roll DEPS for libsrtp to pick up version 2.0. Fix up remaining client.
Roll src/third_party/libsrtp/ b17c065a8..71692eaab (5 commits).
https://chromium.googlesource.com/chromium/deps/libsrtp.git/+log/b17c065a8a63..71692eaab2a0
$ git log b17c065a8..71692eaab --date=short --no-merges --format='%ad %ae %s'
2016-10-20 kjellander Only build libsrtp tests if a build flag is set
2016-10-20 kjellander Don't build tests on Windows.
2016-10-12 kjellander Disable warning for signed/unsigned mismatch in MSVC
2016-10-10 kjellander Make libsrtp configuration public
2016-10-06 kjellander Update libsrtp to version 2.0
BUG=webrtc:6376
Review-Url: https://chromiumcodereview.appspot.com/2436913003
Cr-Commit-Position: refs/heads/master@{#426814}
3 files changed
