Update V8 to r6768 as required by WebKit r78450

Change-Id: Ib8868ff7147a76547a8d1d85f257ebe8546a3d3f
diff --git a/AUTHORS b/AUTHORS
index ea5b93e..92b69cb 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -9,6 +9,7 @@
 Hewlett-Packard Development Company, LP
 
 Alexander Botero-Lowry <alexbl@FreeBSD.org>
+Alexander Karpinsky <homm86@gmail.com>
 Alexandre Vassalotti <avassalotti@gmail.com>
 Andreas Anyuru <andreas.anyuru@gmail.com>
 Bert Belder <bertbelder@gmail.com>
@@ -26,11 +27,14 @@
 Matt Hanselman <mjhanselman@gmail.com>
 Martyn Capewell <martyn.capewell@arm.com>
 Michael Smith <mike@w3.org>
+Mike Gilbert <floppymaster@gmail.com>
 Paolo Giarrusso <p.giarrusso@gmail.com>
 Patrick Gansterer <paroga@paroga.com>
 Rafal Krypa <rafal@krypa.net>
 Rene Rebe <rene@exactcode.de>
 Rodolph Perfetta <rodolph.perfetta@arm.com>
 Ryan Dahl <coldredlemur@gmail.com>
+Sanjoy Das <sanjoy@playingwithpointers.com>
 Subrato K De <subratokde@codeaurora.org>
 Vlad Burlik <vladbph@gmail.com>
+Zaheer Ahmad <zahmad@codeaurora.org>