R1:d2935fd7bdc2

Fix a bad call to "writeInfo()" in "bin/phd stop" with no PHABRICATOR_INSTANCE defined

Summary: See <https://discourse.phabricator-community.org/t/phd-status-calls-to-undefined-method-when-theres-no-instance/2918>. This call should be `logInfo()`.

Test Plan:
- Purged `PHABRICATOR_INSTANCE` from my environment. In a Phacility development environment, it comes from loading `services/`.
- Ran `bin/phd stop` with all daemons already stopped.
- Before: bad call.
- After: helpful error.
- Ran…