[coreboot] Jenkins: Build test all programs under `utils` too

[Paul Menzel]

Dear coreboot folks,

if I am not mistaken, all programs under `utils/` are currently not
built tested. Could that be changed, please? Maybe the following script
could be integrated somehow?

$ for s in util/*; do cd "$s"; make; cd -; done

Be aware that I have no idea how to use Jenkins.

Thanks,

Paul