package/mariadb: security bump to version 10.3.28

package/mariadb: security bump to version 10.3.28

Fix CVE-2021-27928: A remote code execution issue was discovered in
MariaDB 10.2 before 10.2.37, 10.3 before 10.3.28, 10.4 before 10.4.18,
and 10.5 before 10.5.9; Percona Server through 2021-03-03; and the wsrep
patch through 2021-03-03 for MySQL. An untrusted search path leads to
eval injection, in which a database SUPER user can execute OS commands
after modifying wsrep_provider and wsrep_notify_cmd. NOTE: this does not
affect an Oracle product.

https://mariadb.com/kb/en/mariadb-10328-release-notes/
https://mariadb.com/kb/en/mariadb-10328-changelog/

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>