Check result in GNU Hello tutorial
    
    In the GNU Hello tutorial,
    in order to better explain what was produces,
    run some basic checks against the produced package:
    list files, list requires, list provides.
    Finally, install and run the package.
    
    Adding these checks closes the gap to another similar docs page,
    "Creating RPM Packages" in Fedora Quick Docs.
    Adding the missing parts in the GNU Hello Tutorial
    allows removing that page.