MFH: r452889

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)
Approved by: ports-secteam (swills)
Security: d7d1cc94-b971-11e7-af3a-f1035dd0da62
Differential Revision: https://reviews.freebsd.org/D12783