Added 'Kenneth Endfinger' to AUTHORS file

Patch supplied by Kenneth Endfinger

R=ricow@google.com

Review URL: https://codereview.chromium.org//359483005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@37815 260f80e4-7a28-3924-810f-c04153c831b5

AUTHORS

@@ -30,4 +30,5 @@ Victor Berchet <victor.berchet@gmail.com>
 Roel Spilker <r.spilker@gmail.com>
 Martin Charles <martincharles07@gmail.com>
 Anders Holmgren <andersmholmgren@gmail.com>
-K. Alex Gann <k.alexgann@gmail.com>
+K. Alex Gann <k.alexgann@gmail.com>
+Kenneth Endfinger <kaendfinger@gmail.com>