Update V8 to r5780 as required by WebKit r71558

Change-Id: Ie3936550b99967a13755930d0dac0a59c3562625
diff --git a/ChangeLog b/ChangeLog
index 0785959..ea07009 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,26 @@
+2010-11-08: Version 2.5.5
+
+        Added more aggressive GC of external objects in near out-of-memory
+        situations.
+
+        Fixed a bug that gave the incorrect result for String.split called
+        on the empty string (issue 924).
+
+
+2010-11-03: Version 2.5.4
+
+        Improved V8 VFPv3 runtime detection to address issue 914.
+
+
+2010-11-01: Version 2.5.3
+
+        Fixed a bug that prevents constants from overwriting function values
+        in object literals (issue 907).
+
+        Fixed a bug with reporting of impossible nested calls of DOM functions
+        (issue http://crbug.com/60753).
+
+
 2010-10-27: Version 2.5.2
 
         Improved sampler resolution on Linux.