www/node4: 4.4.5 -> 4.4.6

This is an important security release. Please consult
https://nodejs.org/en/blog/vulnerability/june-2016-security-releases/
for the details.

This release is specifically related to a Buffer overflow vulnerability
discovered in v8, more details can be found in the CVE 2016-1669.

PR: 210520
Changes: https://nodejs.org/en/blog/release/v4.4.6/
Submitted by: Bradley T. Hughes <bradleythughes@fastmail.fm> (maintainer)