Fix condition in merge-to-branch.sh

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/101973002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18237 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/merge-to-branch.sh

@@ -118,7 +118,7 @@ if [ $START_STEP -le $CURRENT_STEP ] ; then
     fi
   fi
   echo ">>> Step $CURRENT_STEP: Preparation"
-  if [ $REVERT_FROM_BLEEDING_EDGE==1 ] ; then
+  if [ $REVERT_FROM_BLEEDING_EDGE -eq 1 ] ; then
     MERGE_TO_BRANCH="bleeding_edge"
   else
     MERGE_TO_BRANCH=$1