deps: backport use strict fix for V8 debugger

Backport 2ad2237507c5b5f9047b8d94d2f4997327eae852 from V8.

Original commit message:

  Fix Unhandled ReferenceError in debug-debugger.js

  This fixes following exception in Sky on attempt to set a breakpoint
  "Unhandled: Uncaught ReferenceError: break_point is not defined"
  I think this happens in Sky but not in Chrome because Sky scripts are executed in strict mode.

  BUG=None
  LOG=N
  R=yangguo@chromium.org

  Review URL: https://codereview.chromium.org/741683002



  Cr-Commit-Position: refs/heads/master@{#25415}

Reviewed-By: Trevor Norris <trev.norris@gmail.com>
PR-URL: https://github.com/joyent/node/pull/18206