Force static linking by setting CGO_ENABLED=0.

[bendory]

Changes

Fixes #1659

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These are the criteria that every PR should meet, please check them off as you
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• Includes tests no functional change
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Release Notes

Debian packaging updated to create a static-linked binary.

[tekton-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[vdemeester]

/cc @chmouel

[chmouel]

i think debian packaging linter is not going to like static binary, were you able to generate a binary package out of this change?

[bendory]

i think debian packaging linter is not going to like static binary, were you able to generate a binary package out of this change?

Yes -- but as noted, I'm running on a Google-internal Debian distribution; IDK what differences you will see when you compile in the wild.

[chmouel]

perhaps ubuntu ppa upload farm has a linters which is not allowing static binaries.

i guess the only way to know that is to make a release, so i guess that would be the surprise for next time :) /cc @tektoncd/cli-collaborators

/lgtm
/approve

[tekton-robot]

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