stand: fix WITHOUT_FORTH/WITHOUT_LOADER_LUA build

Previously having ficl/liblua in LIB32LIST with their respective option
turned OFF would be relatively harmless, as we wouldn't act on it unless we
were building the non-32 variant. As of ac5f382a9d0a, however, these are
now used for dependencies in some cases and must reflect what's actually
going to be built.