Prepare push to trunk. Now working on version 3.15.12.

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/11514002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13184 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2012-12-10: Version 3.15.11
+
+        Define CAN_USE_VFP2/3_INSTRUCTIONS based on arm_neon and arm_fpu GYP
+        flags.
+
+        Performance and stability improvements on all platforms.
+
+
 2012-12-07: Version 3.15.10
 
         Enabled optimisation of functions inside eval. (issue 2315)

src/version.cc

@@ -34,7 +34,7 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     15
-#define BUILD_NUMBER      11
+#define BUILD_NUMBER      12
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)