Code review comment for lp:~kirkland/ubuntu-dev-tools/612267

I don't think the position of moreutils in the archive is a good reason
to stick errno in ubuntu-dev-tools. moreutils is an increasingly useful
package, and if we submit things there when they're appropriate then it
will increasingly become the sort of package we want in main. Worrying
about whether the package is in main or universe first is backwards.

We discussed ubuntu-dev-tools in the derivatives round table at DebConf,
and agreed (or perhaps reinforced) that we should only put things
specific to Ubuntu development there.