Bug: exec: bash -c: not found

[krancour]

Seen on recent deploy of buildpack apps:

$ kubectl logs iambic-offering-v2-web-s63x6 --namespace=iambic-offering --previous
2016/04/19 17:43:23 Successfully copied home/iambic-offering:git-5450cbcd/push/slug.tgz to slug.tgz
/runner/init: line 76: exec: bash -c: not found

Seems traceable back to here:

https://github.com/deis/slugrunner/pull/27/files

I have a PR already in the works to correct this without completely reverting https://github.com/deis/slugrunner/pull/27/files

cc @mboersma

[bacongobbler]

fwiw I'm on workflow-dev deploying example-go without issue