checkInputs used to be added to nativeBuildInputs. Now we have
nativeCheckInputs to do that instead. Doing this treewide change allows
to keep hashes identical to before the introduction of
nativeCheckInputs.
This package has absorbed zimwriterfs and some other programs. I've
kept the maintainer the same since if they were interested in
zimwriterfs they're presumably also interested in the new package.
