Send the aphlict process log to the node log

Summary: I've possibly seen a couple of aphlict processes exit under suspicious circumstances (maybe?). Make sure any PHP errors get captured into the log.

Test Plan:

• Added an exception after forking.
• Before change: vanished into thin air.
• After change: visible in the log.

Reviewers: chad

Reviewed By: chad

Differential Revision: https://secure.phabricator.com/D15782