Log Message:
Update lang/nodejs4 to 4.7.0

The SEMVER-MINOR changes include:

- build: export openssl symbols on Windows making it possible to
  build addons linking against the bundled version of openssl
- debugger: make listen address configurable in the debugger server
- dgram: generalized send queue to handle close fixing a potential
  throw when dgram socket is closed in the listening event handler.
- http: Introduce the 451 status code "Unavailable For Legal Reasons"
- tls: introduce secureContext for tls.connect which is useful for
  caching client certificates, key, and CA certificates.

Notable SEMVER-PATCH changes include:

build:
- introduce the configure --shared option for embedders
- gtest: the test reporter now outputs tap comments as yamlish
- src: node no longer aborts when c-ares initialization fails
- tls: fix memory leak when writing data to TLSWrap instance during
  handshake