justinsb: bash script: don't assume nodeup filename

JobBuild
05bbf9cb
08-22 05:14
83b0b0ff
08-22 05:01
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pull-kops-e2e-kubernetes-aws 1164405473936412672 1164402064881618944
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pull-kops-verify-gofmt 1164405473936412673 1164402064877424652
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