feat: s390x build option added to build package for IBM Z series

[harpaldhillon]

A new build option (release/goss-linux-s390x) is added in the Makefile to release package for s390x architecture.

Checklist

• make test-all (UNIX) passes. CI will also test this
• unit and/or integration tests are included (if applicable)
• documentation is changed or added (if applicable)

Description of change

A new build option (release/goss-linux-s390x) is added in the Makefile to release package for s390x architecture.

[aelsabbahy]

Sorry for the delay, I recently had a newborn so been busy.

This looks good, just need to update the .travis.yaml to ensure those binaries are published as part of the release.

For my own education/growth, do all goss features work out the box for s390x? or does it only partially work? Wondering if it should be a standard release or something in the multi-os support section.

[harpaldhillon]

Many congratulations @aelsabbahy on your newborn baby.

Thanks, changes are now pushed to .travis.yaml file.

Also, we run around 175 goss tests based on CIS benchmarks and all these successfully passed on s390x machine. I think it can be part of standard release.

[aelsabbahy]

Thank you for taking the time to submit this. Should be in the next Goss release.