Improve handling of `#[` attributes in `php -a`

`php -a` treats lines starting with `#` as comments when deciding if
the provided statement is valid.

So it passed `#[MyAttr]` to the parser after the user hits enter,
causing a syntax error for multi-line statements..

With this patch, the following snippet is parsed correctly

```
php > #[Attr]
php > function x() { }
php > var_export((new ReflectionFunction('x'))->getAttributes()[0]->getName());
'Attr'
```

Followup to GH-6085

Closes GH-6086

0 files changed, 0 insertions, 0 deletions