Fix #1532 Add Phalcon\Assets\Collection::setTargetLocal

[dreamsxin]

See #1532

    public function testIssue1532()
    {
        @unlink(__DIR__ . '/assets/production/1532.js');
        $di = new \Phalcon\DI\FactoryDefault();
        $assets = new \Phalcon\Assets\Manager();
        $assets->useImplicitOutput(false);
        $assets->collection('js')
            ->addJs('unit-tests/assets/jquery.js')
            ->join(true)
            ->addFilter(new Phalcon\Assets\Filters\Jsmin())
            ->setTargetPath(__DIR__ .'/assets/production/1532.js')
            ->setTargetLocal(FALSE)
            ->setPrefix('//phalconphp.com/')
            ->setTargetUri('js/jquery.js');

        $this->assertEquals($assets->outputJs('js'), '<script type="text/javascript" src="//phalconphp.com/js/jquery.js"></script>' . PHP_EOL);
    }

[phalcon]

Thanks