Don't ignore the tests results but rather have a tolerance rate
    
    Historically, we ignored the test results as we don't have the
    manpower to investigate the failures on various architectures.
    
    Since most of the test pass, I've added a 1% failure tolerance
    on everything except x86_64, so we do no longer need to ignore the
    results. This makes it easier to spat that it's no longer a couple
    test that fails on some random architecture but rather a more
    severe problem.
    
    In the process I had to disable test_decomp on ppc64le, because it
    segfaults.