Usages of include/require in expressions incorrectly marked as errors

From new parser, #357 

```php
include 'foo.php';          // No error
include('foo.php');         // No error
if(include 'foo.php'){}     // No error
$bar = include 'foo.php';   // Error
$bar = (include 'foo.php'); // No error
@include 'foo.php';         // Error
@(include 'foo.php');       // No error
@include('foo.php');        // Error
!include 'foo.php';         // Error
```