Add 'LOG=N' line to merge-to-branch.sh to avoid presubmit errors when merging to branch.

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/128223002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18494 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/merge-to-branch.sh

@@ -179,6 +179,7 @@ revisions associated with the patches."
   done
   if [ -n "$BUG_AGGREGATE" ] ; then
     echo "BUG=$BUG_AGGREGATE" >> $COMMITMSG_FILE
+    echo "LOG=N" >> $COMMITMSG_FILE
   fi
   persist "NEW_COMMIT_MSG"
   persist "REVISION_LIST"