deps: log V8 version in profiler log file

Patch from issue 800293002 authored by ben@strongloop.com

Review URL: https://codereview.chromium.org/806143002

PR-URL: https://github.com/joyent/node/pull/9043


Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Timothy J Fontaine <tjfontaine@gmail.com>