pyoxidizer: don't use in-memory for resources on macOS When trying to debug something else on macOS, pyoxidized builds were failing with the following message about pywatchman (and then cext.base85 when I commented out pywatchman): "cannot be loaded from memory but memory loading required" I don't have any immediate plans to do more work on macOS, but maybe this will save someone else time debugging this. Differential Revision: https://phab.mercurial-scm.org/D11451