main/samba: upgrade to 4.15.9
Upgrade version to fix some CVEs
o CVE-2022-2031: Samba AD users can bypass certain restrictions associated with changing passwords. https://www.samba.org/samba/security/CVE-2022-2031.html
o CVE-2022-32744: Samba AD users can forge password change requests for any user. https://www.samba.org/samba/security/CVE-2022-32744.html
o CVE-2022-32745: Samba AD users can crash the server process with an LDAP add or modify request. https://www.samba.org/samba/security/CVE-2022-32745.html
o CVE-2022-32746: Samba AD users can induce a use-after-free in the server process with an LDAP add or modify request. https://www.samba.org/samba/security/CVE-2022-32746.html
o CVE-2022-32742: Server memory information leak via SMB1. https://www.samba.org/samba/security/CVE-2022-32742.html