/usr/bin/gdbus-codegen has bogus #! line

[Barry Warsaw]

% head -n 1 /usr/bin/gdbus-codegen
#!/usr/bin/env python

While it's fine, preferable in fact for the development version of gdbus-codegen to have #! /usr/bin/env python, it is not correct for the deployed production version to use it. That's just asking for breakage. Instead, the installed version should use #!/usr/bin/python