Expose builtin v8 modules to AtomSandboxedRendererClient

- Adapt node.cc code that implements `process.binding` to create a similar
  object in AtomSandboxedRendererClient.
- Replace the ipc binding object passed to `lib/sandboxed_renderer/init.js` by
  the new binding object.
- Refactor the initialization script to use this new object to fetch the ipc
  binding and store as a hidden value using the `v8_util` module.

This change also required applying a patch to node.js, so the submodule commit
was updated.

lib/sandboxed_renderer/init.js

@@ -2,25 +2,32 @@
 // in filenames.gypi so they get built into the preload_bundle.js bundle
 
 /* eslint no-eval: "off" */
-/* global binding, preloadPath, process, Buffer */
+/* global binding, preloadPath, Buffer */
 const events = require('events')
 
+const atomBinding = require('../common/atom-binding-setup')(binding.get, 'renderer')
+
+const v8Util = atomBinding('v8_util')
+const ipc = atomBinding('ipc')
+
 const ipcRenderer = new events.EventEmitter()
 const proc = new events.EventEmitter()
 // eval in window scope:
 // http://www.ecma-international.org/ecma-262/5.1/#sec-10.4.2
 const geval = eval
 
-require('../renderer/api/ipc-renderer-setup')(ipcRenderer, binding)
+require('../renderer/api/ipc-renderer-setup')(ipcRenderer, ipc)
 
-binding.onMessage = function (channel, args) {
+ipc.onMessage = function (channel, args) {
   ipcRenderer.emit(channel, ...args)
 }
 
-binding.onExit = function () {
+ipc.onExit = function () {
   proc.emit('exit')
 }
 
+v8Util.setHiddenValue(global, 'ipc', ipc)
+
 const preloadModules = new Map([
   ['electron', {
     ipcRenderer: ipcRenderer