www/node4: Update 4.8.4_2 -> 4.8.5

[bhughes]

Summary

www/node4: Update 4.8.4_2 -> 4.8.5

Update to the latest upstream v4.x release to address a remote DoS
vulnerability.

https://nodejs.org/en/blog/vulnerability/oct-2017-dos/
https://nodejs.org/en/blog/release/v4.8.5/

Approved by: robak (mentor)
Security: CVE-2017-14919
MFH: 2017Q4

Test Plan

$ pwd
/usr/ports/www/node4
$ portlint -C
WARN: Makefile: possible use of absolute pathname "/etc/make.conf".
WARN: Makefile: "IGNORE" has to appear earlier.
WARN: Makefile: "ONLY_FOR_ARCHS" has to appear earlier.
0 fatal errors and 3 warnings found.

http://35.176.84.170/data/latest-per-pkg/node4/4.8.5/

[robak]

LGTM.