www/node5: 5.11.0 -> 5.11.1

Update to the latest upstream v5.x stable release after the recent
openssl CVEs.

Release announcement with changelog is here:

https://nodejs.org/en/blog/release/v5.11.1
https://nodejs.org/en/blog/vulnerability/openssl-may-2016/

PR: 209341
MFH: 2016Q2
Submitted by: Bradley T. Hughes <bradleythughes@fastmail.fm> (maintainer)