Handle assignment of the interceptor value identified by |name|. |object|
is the receiver ('this' object) of the interceptor. |value| is the new
value being assigned to the interceptor. If assignment fails, set
|exception| to the exception that will be thrown. This setter will always
be called, even when the property has an associated accessor. Return true
(1) if interceptor assignment was handled, false (0) otherwise.
Handle assignment of the interceptor value identified by |name|. |object| is the receiver ('this' object) of the interceptor. |value| is the new value being assigned to the interceptor. If assignment fails, set |exception| to the exception that will be thrown. This setter will always be called, even when the property has an associated accessor. Return true (1) if interceptor assignment was handled, false (0) otherwise.