test: investigate test-dgram-implicit-bind

[refack]

• Version: master
• Platform: freebsd11-x64
• Subsystem: test,dgram

311	parallel/test-dgram-implicit-bind	
duration_ms	0.442
severity	crashed
stack	oh no!
exit code: CRASHED (Signal: 11)

https://ci.nodejs.org/job/node-test-commit-freebsd/9699/nodes=freebsd11-x64/tapResults/

[refack]

/cc @nodejs/platform-freebsd

[apapirovski]

I don't think this failure has reoccurred recently so I'm going to close this out even though we haven't come to any sort of resolution. Feel free to re-open if you disagree with that decision.