Update a Phabricator -> Arcanist include path for scripts in Phabricator
Update a Phabricator -> Arcanist include path for scripts in Phabricator

Summary: Ref T13395. Since there's very little code which really makes sense in "scripts/", I've moved most of it to other places.

Test Plan: Ran `bin/phd`.

Maniphest Tasks: T13395

Differential Revision: https://secure.phabricator.com/D20994

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