fix(compartment-mapper): fix for bundling of appended cjs exports

[kumavis]

bug fix for bundler for supporting the following commonjs exports patterns

module.exports.abc = 123
exports.xyz = 456

Originally tried to fix it with https://github.com/endojs/endo/commit/7daba15b88752898ab1f9a1895d5cf479ea3575f but this was insufficient, need to add missing cells and update the * cell

not sure if this is the correct change or just a bandaid but it got tests passing