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.
Emily isn't gone but mostly dormant for right now; I maintain almost all
other EDA tooling so this will ensure I'm CC'd on needed changes and
updates, especially since some Amaranth and Glasgow have some ties to
Yosys.
Signed-off-by: Austin Seipp <aseipp@pobox.com>