Minor change to PhutilInfrastructureTestCase::testLibraryMap
Summary: Modify PhutilInfrastructureTestCase::testLibraryMap to use phutil_get_current_library_name() instead of hard-coding the library name.
Test Plan: Ran arc unit, tests passed. Added a new function without running arc liberate, tests failed.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: epriestley, Korvin
Differential Revision: https://secure.phabricator.com/D9844