package/php: security bump version to 7.3.5
Release notes: https://www.php.net/archive/2019.php#id2019-05-02-1
Fixes 2019-11036:
* Heap-buffer-overflow in _estrndup via exif_process_IFD_TAG
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>