Support array return type for Generator
Support array return type for Generator

closes #1684

dreamsxin/zephir,dreamsxin/zephir,vpg/zephir,vpg/zephir,dreamsxin/zephir,phalcon/zephir,zephir-lang/zephir,zephir-lang/zephir,vpg/zephir,phalcon/zephir,vpg/zephir,phalcon/zephir,vpg/zephir,vpg/zephir,dreamsxin/zephir,zephir-lang/zephir,phalcon/zephir,phalcon/zephir,zephir-lang/zephir,dreamsxin/zephir,phalcon/zephir,zephir-lang/zephir,dreamsxin/zephir