Investigate flaky test-fs-watch-encoding

- **Version**: unrelated change rebased on `master`
- **Platform**: `osx1010`
- **Subsystem**: test

https://ci.nodejs.org/job/node-test-commit-osx/3726/nodes=osx1010/tapTestReport/test.tap-598/

```
not ok 598 parallel/test-fs-watch-encoding
# TIMEOUT
```

Test source: https://github.com/nodejs/node/blob/master/test/parallel/test-fs-watch-encoding.js

cc @nodejs/testing 
