Added function php-lineup-arglist to allow for variable indentation inside arglists.

I added this function so that the Symfony2 style would format a function call
like this:

```php
$this->factory->addType(
    $this
        ->getMockBuilder('Symfony\Bridge\Doctrine\Form\Type\EntityType')
        ->disableOriginalConstructor()
        ->getMock(),
    $next
);
```

instead of this:

```php
$this->factory->addType(
    $this
    ->getMockBuilder('Symfony\Bridge\Doctrine\Form\Type\EntityType')
    ->disableOriginalConstructor()
    ->getMock(),
    $next
);
```