Use %autosetup instead of %setup
    
    This makes it easier to modify the spec to apply a patch for testing.
    
    The -q option is dropped, as it's the default for %autosetup:
    https://rpm-software-management.github.io/rpm/manual/autosetup.html#autosetup-options
    
    Signed-off-by: Ondrej Mosnáček <omosnacek@gmail.com>