Update V8 to r5447 as required by WebKit r67908

Change-Id: I5af6ccf18523cb7e28460e6bbc044444256cdb97
diff --git a/AUTHORS b/AUTHORS
index 65b8965..cd6eeac 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -9,6 +9,7 @@
 
 Alexander Botero-Lowry <alexbl@FreeBSD.org>
 Alexandre Vassalotti <avassalotti@gmail.com>
+Burcu Dogan <burcujdogan@gmail.com>
 Craig Schlenter <craig.schlenter@gmail.com>
 Daniel Andersson <kodandersson@gmail.com>
 Daniel James <dnljms@gmail.com>
@@ -21,6 +22,7 @@
 Kun Zhang <zhangk@codeaurora.org>
 Matt Hanselman <mjhanselman@gmail.com>
 Martyn Capewell <martyn.capewell@arm.com>
+Michael Smith <mike@w3.org>
 Paolo Giarrusso <p.giarrusso@gmail.com>
 Patrick Gansterer <paroga@paroga.com>
 Rafal Krypa <rafal@krypa.net>
@@ -28,6 +30,4 @@
 Rodolph Perfetta <rodolph.perfetta@arm.com>
 Ryan Dahl <coldredlemur@gmail.com>
 Subrato K De <subratokde@codeaurora.org>
-Burcu Dogan <burcujdogan@gmail.com>
 Vlad Burlik <vladbph@gmail.com>
-