test/timeout: include some notion of verifying length of timeout
test/timeout: include some notion of verifying length of timeout

In my testing, we're always right on 1000 msec, but allow some slack
and just judge it good if we're within +- 50%.

Signed-off-by: Jens Axboe <cd8c6775e60d6f67a6984377324e5290df3d5358@kernel.dk>

axboe/liburing,axboe/liburing,axboe/liburing