R1:92a243492e27

Fix loading owning package

Summary: It is completely broken since D2943.

Test Plan:
PhabricatorOwnersPackage::loadAffectedPackages($repository, $path);

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3067