Update lang/nodejs to 5.4.0.

http:
- A new status code was added: 451 - "Unavailable For Legal Reasons"
- Idle sockets that have been kept alive now handle errors

This release also includes several minor performance improvements:
- assert: deepEqual is now speedier when comparing TypedArrays
- lib: Use arrow functions instead of bind where possible
- node: Improved accessor perf of process.env
- node: Improved performance of process.hrtime()
- node: Improved GetActiveHandles performance
- util: Use faster iteration in util.format()

(fhajny)