[Auto-roll] Bump up version to 3.28.72.0

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/466863002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23089 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/version.cc

@@ -11,7 +11,7 @@
 // system so their names cannot be changed without changing the scripts.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     28
-#define BUILD_NUMBER      70
+#define BUILD_NUMBER      72
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)