libvpx: Add VP9 decoder.

source/libvpx/third_party/x86inc/LICENSE

Index: source/libvpx/third_party/x86inc/LICENSE
===================================================================
--- source/libvpx/third_party/x86inc/LICENSE	(revision 0)
+++ source/libvpx/third_party/x86inc/LICENSE	(revision 0)
@@ -0,0 +1,18 @@
+Copyright (C) 2005-2012 x264 project
+
+Authors: Loren Merritt <lorenm@u.washington.edu>
+         Anton Mitrofanov <BugMaster@narod.ru>
+         Jason Garrett-Glaser <darkshikari@gmail.com>
+         Henrik Gramner <hengar-6@student.ltu.se>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.