package/php: security bump version to 7.4.6
Changelog: https://www.php.net/ChangeLog-7.php#7.4.6
Fixes CVE 2019-11048.
Reformatted hashes.
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>