Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/AUTHORS

Index: source/libvpx/AUTHORS
===================================================================
--- source/libvpx/AUTHORS	(revision 96967)
+++ source/libvpx/AUTHORS	(working copy)
@@ -4,8 +4,11 @@
 Aaron Watry <awatry@gmail.com>
 Adrian Grange <agrange@google.com>
 Alex Converse <alex.converse@gmail.com>
+Alexis Ballier <aballier@gentoo.org>
+Alok Ahuja <waveletcoeff@gmail.com>
 Andoni Morales Alastruey <ylatuya@gmail.com>
 Andres Mejia <mcitadel@gmail.com>
+Aron Rosenberg <arosenberg@logitech.com>
 Attila Nagy <attilanagy@google.com>
 Fabio Pedretti <fabio.ped@libero.it>
 Frank Galligan <fgalligan@google.com>
@@ -22,20 +25,29 @@
 Jim Bankoski <jimbankoski@google.com>
 Johann Koenig <johannkoenig@google.com>
 John Koleszar <jkoleszar@google.com>
+Joshua Bleecher Snyder <josh@treelinelabs.com>
 Justin Clift <justin@salasaga.org>
 Justin Lebar <justin.lebar@gmail.com>
+Lou Quillio <louquillio@google.com>
 Luca Barbato <lu_zero@gentoo.org>
 Makoto Kato <makoto.kt@gmail.com>
 Martin Ettl <ettl.martin78@googlemail.com>
 Michael Kohler <michaelkohler@live.com>
+Mike Hommey <mhommey@mozilla.com>
 Mikhal Shemer <mikhal@google.com>
 Pascal Massimino <pascal.massimino@gmail.com>
 Patrik Westin <patrik.westin@gmail.com>
 Paul Wilkins <paulwilkins@google.com>
 Pavol Rusnak <stick@gk2.sk>
 Philip Jägenstedt <philipj@opera.com>
+Rafael Ávila de Espíndola <rafael.espindola@gmail.com>
+Ralph Giles <giles@xiph.org>
+Ronald S. Bultje <rbultje@google.com>
 Scott LaVarnway <slavarnway@google.com>
+Stefan Holmer <holmer@google.com>
+Taekhyun Kim <takim@nvidia.com>
 Tero Rintaluoma <teror@google.com>
+Thijs Vermeir <thijsvermeir@gmail.com>
 Timothy B. Terriberry <tterribe@xiph.org>
 Tom Finegan <tomfinegan@google.com>
 Yaowu Xu <yaowu@google.com>