Move version macros to public V8 header.

tools/merge-to-branch.sh

Index: tools/merge-to-branch.sh
diff --git a/tools/merge-to-branch.sh b/tools/merge-to-branch.sh
index e0011edff02d382559172eee478bd4a9efb48750..f9984c7bb57af42c6d6ddf656c40a5b85aa94756 100755
--- a/tools/merge-to-branch.sh
+++ b/tools/merge-to-branch.sh
@@ -200,12 +200,12 @@ if [ $START_STEP -le $CURRENT_STEP ] ; then
   echo ">>> Step $CURRENT_STEP: Increment version number."
   restore_if_unset "PATCH"
   NEWPATCH=$(($PATCH + 1))
-  confirm "Automatically increment PATCH_LEVEL? (Saying 'n' will fire up \
+  confirm "Automatically increment V8_PATCH_LEVEL? (Saying 'n' will fire up \
 your EDITOR on $VERSION_FILE so you can make arbitrary changes. When \
 you're done, save the file and exit your EDITOR.)"
   if [ $? -eq 0 ] ; then
     echo $NEWPATCH $VERSION_FILE
-    sed -e "/#define PATCH_LEVEL/s/[0-9]*$/$NEWPATCH/" \
+    sed -e "/#define V8_PATCH_LEVEL/s/[0-9]*$/$NEWPATCH/" \
         -i.bak "$VERSION_FILE" || die "Could not increment patch level"
   else
     $EDITOR "$VERSION_FILE"