package/samba4: security bump version to 4.11.13

package/samba4: security bump version to 4.11.13

Version 4.11.11 fixed
o CVE-2020-10730: NULL pointer de-reference and use-after-free in Samba AD DC
		  LDAP Server with ASQ, VLV and paged_results.
o CVE-2020-10745: Parsing and packing of NBT and DNS packets can consume
		  excessive CPU
o CVE-2020-10760: LDAP Use-after-free in Samba AD DC Global Catalog with
		  paged_results and VLV.
o CVE-2020-14303: Empty UDP packet DoS in Samba AD DC nbtd.

Version 4.11.12 was a bugfix-only release.

Version 4.11.13 fixes CVE-2020-1472.

Release notes:
https://www.samba.org/samba/history/samba-4.11.11.html
https://www.samba.org/samba/history/samba-4.11.12.html
https://www.samba.org/samba/security/CVE-2020-1472.html

Rebased patches 0001 & 0002.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>