package/php: security bump version to 7.4.4
Changelog: https://www.php.net/ChangeLog-7.php#7.4.4
Fixes CVE-2020-7064, CVE-2020-7065 & CVE-2020-7066.
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>