Fix #944 include docker-credential-acr-linux

[noni73]

Fixes #944 . in case of a bug fix, this should point to a bug and any other related issue(s)

Description

includes docker-credential-acr-linux in the docker image.

Submitter Checklist

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• Includes unit tests
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Reviewer Notes

• The code flow looks good.
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Release Notes

Describe any changes here so maintainer can include it in the release notes, or delete this block.

Examples of user facing changes:
- docker-credential-acr-linux is now included

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[noni73]

@googlebot I signed it!

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On 3 Jan 2020, 10:50 +0100, GoogleContainerTools/kaniko ***@***.***>, wrote: @googlebot I signed it!

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[cvgw]

Can we lock this to a specific version of the credential helper?

[noni73]

As far as i can see this tool does not have releases / version numbers yet.

[cvgw]

Ya that's what I see too, bummer. Hopefully we won't have too many problems with updates