kjellander e7b0f522d7 Add rtc_enable_external_auth variable for setting ENABLE_EXTERNAL_AUTH
This will make it easier for some downstream projects to control whether
or not to set ENABLE_EXTERNAL_AUTH, via the GN variable.

BUG=None
NOTRY=True

Review-Url: https://codereview.webrtc.org/2608673002
Cr-Commit-Position: refs/heads/master@{#15894}
2017-01-04 06:09:25 +00:00
..
2016-11-16 19:11:38 +00:00