Cannot run program "/bin/sh" (in directory ...): error=2, No such file or directory

[richardlau]

Refs: nodejs/reliability#277

e.g. https://ci.nodejs.org/job/node-test-commit-linux/45769/nodes=rhel8-x64/console

18:28:10 Caused by: java.io.IOException: Cannot run program "git" (in directory "/home/iojs/build/workspace/node-test-commit-linux"): error=2, No such file or directory

On all the RHEL 8's (x64, ppc64le, s390x). Almost certainly related to the package updates I did much earlier in the day. I've restarted the agents on all of them and that appears to have fixed things.

I've resumed what I think are all of the affected CI runs -- I'll leave this open over the weekend for visibility.

[richardlau]

Release RHEL8 machines were also affected. I've just restarted the agents on those too.