www/node4: 4.4.3 -> 4.4.4

Update to the latest upstream v4.x LTS release after the recent openssl
CVEs.

Release announcement with changelog is here:

https://nodejs.org/en/blog/release/v4.4.4/
https://nodejs.org/en/blog/vulnerability/openssl-may-2016/

PR: 209340
MFH: 2016Q2
Submitted by: Bradley T. Hughes <bradleythughes@fastmail.fm> (maintainer)