Matt Harbison <matt_harbison@yahoo.com> [Sun, 17 Nov 2019 01:00:06 -0500] rev 43726
debuginstall: gracefully handle missing __file__ attributes
This was crashing PyOxidizer. While here, point "Python lib" and "installed
modules" to the oxidized binary when read from memory instead of pretending
their location is unknown.
Differential Revision: https://phab.mercurial-scm.org/D7451