Summary:
Perforce encodes certain characters in filenames (see
https://www.perforce.com/perforce/doc.current/manuals/cmdref/filespecs.html)
We must decode this before we add it to Mercurial.
Test Plan:
python ../../hg-crew/test/run-tests.py test-check* test-p4fastimport*
Reviewers: #idi, #mercurial, rmcelroy
Reviewed By: rmcelroy
Subscribers: rmcelroy, steaphan, medson, mjpieters
Differential Revision: https://phabricator.intern.facebook.com/D5570533
Tasks: 20133877
Signature: t1:5570533:1502010300:0ef3ce0c228c61e23396b5a8ac887ac8c65812ff
