Update V8 to r5675 as required by WebKit r70209

Change-Id: Ib10adb470d41ca8c109ead5fc893b880e18d489f
diff --git a/src/date.js b/src/date.js
index b101ea6..9601470 100644
--- a/src/date.js
+++ b/src/date.js
@@ -246,7 +246,7 @@
 
 
 var ltcache = {
-  key: null, 
+  key: null,
   val: null
 };