Update install script for new Generate-BinFile API

Currently sudo doesn't install correctly.  The generated shim .exe can't successfully run sudo.cmd.  This small change to the `Generate-BinFile` arguments seems to fix the problem.  For whatever reason, current chocolately doesn't expand and doesn't need that `%DIR%` variable.

This pull request doesn't bump the version number cuz I'm not sure exactly how you want to do that.