Only test symbols from the current library
Summary: Limit the acceptance testing surrounding symbols to only consider symbols from the current library. See D11052#107199.
Test Plan: Increased the method visibility of a class in rARC and ran arc lint -- src/ in rP.
Reviewers: epriestley, Blessed Reviewers
Reviewed By: epriestley, Blessed Reviewers
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D11417