Prepare push to trunk. Now working on version 3.21.3.

R=yangguo@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/22801011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16270 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2013-08-22: Version 3.21.2
+
+        Stability improvements on all platforms.
+
+
 2013-08-21: Version 3.21.1
 
         Promoted ArrayBuffer, DataView and typed arrays to non-experimental.

src/version.cc

@@ -34,7 +34,7 @@
 // system so their names cannot be changed without changing the scripts.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     21
-#define BUILD_NUMBER      2
+#define BUILD_NUMBER      3
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)