Fast forward V8 to version 4.2

R=machenbach@chromium.org
LOG=y
BUG=none

Review URL: https://codereview.chromium.org/809803007

Cr-Commit-Position: refs/heads/master@{#26011}

src/version.cc

@@ -9,8 +9,8 @@
 // These macros define the version number for the current version.
 // NOTE these macros are used by some of the tool scripts and the build
 // system so their names cannot be changed without changing the scripts.
-#define MAJOR_VERSION     3
-#define MINOR_VERSION     32
+#define MAJOR_VERSION     4
+#define MINOR_VERSION     2
 #define BUILD_NUMBER      0
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.