parallel/test-http-multi-line-headers timeout on smartos16

* **Version**: head
* **Platform**: smtartos 16
* **Subsystem**: http

Failure when running test for unrelated PR, likely intermittent

https://ci.nodejs.org/job/node-test-commit-smartos/6560/nodes=smartos16-64/console

```bash
not ok 829 parallel/test-http-multi-line-headers
  ---
  duration_ms: 60.98
  severity: fail
  stack: |-
    timeout
  ...
```