Bug#946294: clutter-1.0: Please make autopkgtests cross-test-friendly

[Simon McVittie]

On Fri, 06 Dec 2019 at 15:36:23 -0800, Steve Langasek wrote:
> Sorry, this part was a lie (via cut'n'paste); I failed to notice that this
> test was set -u, so it actually broke for all *non* cross cases.

Thanks for your quick response to feedback! I think this revised patch
looks like a good template for making build-tests cross-friendly.

I left some comments on
https://salsa.debian.org/ci-team/autopkgtest/merge_requests/69, but the
only one that would affect build-tests like this was wondering whether
(build-?)tests should be marked with `Features: cross` as an opt-in to
being run in this way.

    smcv