tests: Add initial integration test for p11-kit
    
    These are documented here and will be used to ensure that p11-kit
    works as expected.
    
    https://fedoraproject.org/wiki/CI
    
    This is just the first such test. Feel free to edit it if there
    are mistakes or add others, or check out the docs:
    
    https://fedoraproject.org/wiki/CI/Tests