tracking TravisCI build issues

[shiftkey]

Currently I'm just turning the TravisCI builds on and off again through the portal when something goes awry. That's not great.

Opening this to track these failures better so I don't need to do this as often.

[shiftkey]

[Linux] Timeout? https://gist.github.com/shiftkey/777ce24a06cb1f4c60ca

[shiftkey]

[Linux] "Got a SIGSEGV while executing native code." https://gist.github.com/shiftkey/ab637423fd610e1dc0ce

[ryangribble]

Here's a new one we hadn't seen before. Perhaps just temporary issue communicating with nuget or something...

[Linux] The command "nuget restore Octokit-Mono.sln" failed and exited with 139 during .
https://travis-ci.org/octokit/octokit.net/jobs/115926780

[ryangribble]

[Linux] Timeout

Same as this one previously

https://travis-ci.org/octokit/octokit.net/jobs/116884393

[M-Zuber]

[Linux] "Got a SIGSEGV while executing native code." https://gist.github.com/M-Zuber/7efea02cbf47fb310131982bbfcbd63b
https://travis-ci.org/octokit/octokit.net/builds/129625518

[alexander-efremov]

[MAC OS]

Assertion at metadata.c:3643, condition `ptr' not met

https://gist.github.com/dampir/b96ee54c5153d8b6f5aed65340ba6e9e

https://travis-ci.org/octokit/octokit.net/jobs/136667692

[shiftkey]

Nothing really changed in here since 2016 so I'm going to close this out.