Intl.ListFormat: Initial tests. (#1679)

...402/ListFormat/constructor/constructor/locales-invalid.js

...ListFormat/constructor/constructor/newtarget-undefined.js

...402/ListFormat/constructor/constructor/options-invalid.js

...tl402/ListFormat/constructor/constructor/options-order.js

...stFormat/constructor/constructor/options-style-invalid.js

...ListFormat/constructor/constructor/options-style-valid.js

...mat/constructor/constructor/options-toobject-prototype.js

...02/ListFormat/constructor/constructor/options-toobject.js

...istFormat/constructor/constructor/options-type-invalid.js

.../ListFormat/constructor/constructor/options-type-valid.js

...2/ListFormat/constructor/constructor/options-undefined.js

test/intl402/ListFormat/constructor/length.js

test/intl402/ListFormat/constructor/name.js

test/intl402/ListFormat/constructor/prop-desc.js

test/intl402/ListFormat/constructor/prototype.js

...ntl402/ListFormat/constructor/supportedLocalesOf/basic.js

...402/ListFormat/constructor/supportedLocalesOf/branding.js

...tl402/ListFormat/constructor/supportedLocalesOf/length.js

...tFormat/constructor/supportedLocalesOf/locales-invalid.js

...intl402/ListFormat/constructor/supportedLocalesOf/name.js