Update lang/nodejs to 7.8.0

2017-03-28, Version 7.8.0

buffer:
- do not segfault on out-of-range index
crypto:
- Fix memory leak if certificate is revoked
deps:
- upgrade npm to 4.2.0
- fix async await desugaring in V8
readline:
- add option to stop duplicates in history

2017-03-21, Version 7.7.4

- deps: Add node-inspect 1.10.6
- inspector: proper WS URLs when bound to 0.0.0.0
- tls: fix segfault on destroy after partial read.

(fhajny)