Add tests for Annex B extn: O.p.__proto__ (#625)

...annexB/built-ins/Object/prototype/__proto__/get-abrupt.js

...nnexB/built-ins/Object/prototype/__proto__/get-fn-name.js

.../built-ins/Object/prototype/__proto__/get-ordinary-obj.js

...built-ins/Object/prototype/__proto__/get-to-obj-abrupt.js

.../annexB/built-ins/Object/prototype/__proto__/prop-desc.js

...annexB/built-ins/Object/prototype/__proto__/set-abrupt.js

...uilt-ins/Object/prototype/__proto__/set-cycle-shadowed.js

.../annexB/built-ins/Object/prototype/__proto__/set-cycle.js

...nnexB/built-ins/Object/prototype/__proto__/set-fn-name.js

...exB/built-ins/Object/prototype/__proto__/set-immutable.js

...built-ins/Object/prototype/__proto__/set-invalid-value.js

...uilt-ins/Object/prototype/__proto__/set-non-extensible.js

...t-ins/Object/prototype/__proto__/set-non-obj-coercible.js

...xB/built-ins/Object/prototype/__proto__/set-non-object.js

.../built-ins/Object/prototype/__proto__/set-ordinary-obj.js