Prepare push to trunk. Now working on version 3.21.18.

R=machenbach@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23669007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16780 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2013-09-18: Version 3.21.17
+
+        Implemented local load/store elimination on basic blocks.
+
+        Added mutex when accessing concurrent recompilation output queue.
+        (Chromium issue 291236)
+
+        Don't lookup the cache for the result of Function::New.
+        (Chromium issue 272579)
+
+        Tweaked HConstant::EmitAtUses() to eliminate useless constant
+        generation.
+        (Chromium issue 2881)
+
+        Performance and stability improvements on all platforms.
+
+
 2013-09-16: Version 3.21.16
 
         Every place where AllocationMemento is initialized with an

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      17
+#define BUILD_NUMBER      18
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)