Log Message:
Update lang/nodejs4 to 4.8.0.

Notable Changes

- child_process: add shell option to spawn()
- deps:
  - v8: expose statistics about heap spaces
- crypto:
  - add ALPN Support
  - allow adding extra certs to well-known CAs
- fs: add the fs.mkdtemp() function.
- process:
  - add externalMemory to process
  - add process.cpuUsage()