PRESUBMIT: Add authorized-authors check + AUTHORS e-mails.

This check will throw a PRESUBMIT error if the author or
organization is not present in the AUTHORS file.

E-mail wildcard entries were also added to the organizations
in the AUTHORS file.

BUG=webrtc:6852
NOTRY=True

Review-Url: https://codereview.webrtc.org/2564613002
Cr-Commit-Position: refs/heads/master@{#15591}

PRESUBMIT.py

@@ -491,6 +491,8 @@ def _CommonChecks(input_api, output_api):
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeHasNoStrayWhitespace(
       input_api, output_api))
+  results.extend(input_api.canned_checks.CheckAuthorizedAuthor(
+      input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeTodoHasOwner(
       input_api, output_api))
   results.extend(_CheckNativeApiHeaderChanges(input_api, output_api))