Includes security fixes for CVE-2017-15398 and CVE-2017-15399.
Also fixes builds for beta and dev branches:
- backport https://webrtc-review.googlesource.com/9384 to fix build for
new webrtc revision
- for dev branch fix gn bootstrap, see
https://chromium-review.googlesource.com/758584
- for 63+ manpage now is not generated during ninja build, it is
processed with sed using packagers tools included in sources
