Comment # 2 on bug 103187 from Chris Wilson

commit eabe87de4652126480e2211d9c088a8eabea2c8a
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Oct 10 18:13:41 2017 +0100

    igt/syncobj_wait: Close the sw_sync timeline after the test

    Closing the sw_sync timeline now signals any remaining fences upon it;
    but test_wait_interrupted requires the fence to be busy for the
    __syncobj_wait() not to immediately return with -ETIME (and so be
    interrupted instead).