Temporarily disable curl tests for FreeBSD 32-bit

[wilzbach]

See also: braddr/d-tester#70 (comment)

I'm aware that this isn't ideal and StdUnittest would be better suited for this, but it keeps the diff small and std.net.curl is broken on FreeBSD 32-bit anyhow.
Moreover, I have the opinion that we should just drop the support for legacy platforms that almost no one actively uses, but well that's a different story.

[dlang-bot]

Thanks for your pull request, @wilzbach!

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[JackStouffer]

Does this issue effect the beta? If so, we should make a final decision about what to do before it's released.

[wilzbach]

Does this issue effect the beta? If so, we should make a final decision about what to do before it's released.

std.net.curl is broken on FreeBSD 32-bit for on anything newer than FreeBSD 8. FreeBSD 9 was released in 2012 and support for FreeBSD 8 ended in 2015.
So as far as I can judge, it doesn't change the status quo at all, but I think it makes merging easier if I target stable and then merge it back to master.

BTW looking at the auto-tester report I see that somehow FreeBSD 32-bit didn't get started for this PR.
CC @braddr

[wilzbach]

The workaround at dmd was targeted at master, not stable. So stable is still broken. Going to rebase this again to master then ...