Fix SVN commit change parser for files moved from deleted directory

Summary:
This continues work started at D2215.
Files moved from deleted directory were marked as Copied Here instead of Moved Here.

Test Plan: Reparsed two commits which was previously wrong, now correct.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Maniphest Tasks: T1114

Differential Revision: https://secure.phabricator.com/D2229