Create the executable template.

def MakeExecutableTemplate(self, output_file=None):
    """Create the executable template."""
    super(DarwinClientBuilder,
          self).MakeExecutableTemplate(output_file=output_file)
    self.SetBuildVars()
    self.MakeBuildDirectory()
    self.BuildWithPyInstaller()
    self.CopyMissingModules()
    self.BuildInstallerPkg(output_file)
    self.MakeZip(output_file, self.template_file)