Decrease the priority of the ArcanistPhutilLibraryLinter
Summary: Ref T5577. Decrease the priority of the ArcanistPhutilLibraryLinter such that it is lower than that of the ArcanistXHPASTLinter. There isn't any specific reason that we should do this, although it seems to generally be a reasonable idea.
Test Plan: N/A
Reviewers: Blessed Reviewers, epriestley
Reviewed By: Blessed Reviewers, epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T5577
Differential Revision: https://secure.phabricator.com/D9866