Update supported os

[ketank-new]

Added support for Linux on Z(s390x)

[chef-supermarket]

Hi. I am an automated pull request bot named Curry. There are commits in this pull request whose authors are not yet authorized to contribute to Chef Software, Inc. projects or are using a non-GitHub verified email address. To become authorized to contribute, you will need to sign the Contributor License Agreement (CLA) as an individual or on behalf of your company. You can read more on Chef's blog.

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• @ketank-ibm

Please sign the CLA here.

[schisamo]

/cc @scotthain

[scotthain]

With proper repos set up, everything should just work 👍

[chef-supermarket]

Hi. Your friendly Curry bot here. Just letting you know that all commit authors have become authorized to contribute. I have added the "Signed CLA" label to this issue so it can easily be found in the future.

[ketank-new]

Hi ,

I would like to know,if there is a Continuous Integration setup for cookbooks
if yes than how can we make s390x part of the CI setup

Regards
Ketan