[pkg-php-pear] symfony (2.3.20) update

["David Prévot"]

Hi Daniel,

> I think the upgrade to 2.3.20 of src:symfony is ready.

Fine, agreed (I just pushed a minor change to rebuild some binary test
files instead of using the one provided with the source).

> A lot of the changes are actually just code formating without any change
> to the program logic itself

Thanks for confirming that first impression. In the perspective of
cherry-picking security related commits if needed for Jessie, we really
want this clean up update in the archive to make this future process less
painful.

I intend to mail ftpmasters on Monday if nobody objects, thanks for your
review and update.

Regards

David