push-to-trunk.sh/merge-to-branch.sh: use "git apply" instead of "patch" to apply patches

tools/merge-to-branch.sh

 #!/bin/bash
 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 168 matching lines @@
   restore_patch_commit_hashes_if_unset "PATCH_COMMIT_HASHES"
   rm -f "$TOUCHED_FILES_FILE"
   for HASH in ${PATCH_COMMIT_HASHES[@]} ; do
     echo "Applying patch for $HASH to $MERGE_TO_BRANCH..."
     git log -1 -p $HASH > "$TEMPORARY_PATCH_FILE"
     apply_patch "$TEMPORARY_PATCH_FILE"
   done
   if [ -n "$EXTRA_PATCH" ] ; then
     apply_patch "$EXTRA_PATCH"
   fi
-  stage_files
 fi
 
 let CURRENT_STEP+=1
 if [ $START_STEP -le $CURRENT_STEP ] ; then
   echo ">>> Step $CURRENT_STEP: Prepare $VERSION_FILE."
   # These version numbers are used again for creating the tag
   read_and_persist_version
 fi
 
 let CURRENT_STEP+=1
@@ skipping 72 matching lines @@
   restore_if_unset "TO_URL"
   restore_if_unset "REVISION_LIST"
   restore_version_if_unset "NEW"
   common_cleanup
   echo "*** SUMMARY ***"
   echo "version: $NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH"
   echo "branch: $TO_URL"
   echo "svn revision: $SVN_REVISION"
   [[ -n "$REVISION_LIST" ]] && echo "patches:$REVISION_LIST"
 fi