skip "TestException#test_thread_signal_location" as known bug
TestException#test_thread_signal_location fails randomly
[BUG] pthread_mutex_lock: Invalid argument (EINVAL)
[BUG] Segmentation fault at 0x0000000000000000
and so on.
This test consists of signal, threads, termination process, and so on.
I've tried to investigate but no idea. Additionally, it is hard to reproduce.
To keep CI clean, I skip this test, file about this issue and wait for a person who can solve this issue.