Updated samba packages fix security vulnerabilities

Updated samba packages fix security vulnerabilities: Stefan Metzmacher discovered that Samba incorrectly enforced SMB signing in certain situations. A remote attacker could use this issue to perform a man in the middle attack. (CVE-2017-12150) Stefan Metzmacher discovered that Samba incorrectly handled encryption across DFS redirects. A remote attacker could use this issue to perform a man in the middle attack. (CVE-2017-12151) Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory when SMB1 is being used. A remote attacker could possibly use this issue to obtain server memory contents. (CVE-2017-12163) Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory when processing certain SMB1 requests. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2017-14746) Volker Lendecke discovered that Samba incorrectly cleared memory when returning data to a client. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2017-15275) The samba package has been updated to version 4.6.12 to fix these issues and other bugs. Also, the talloc package has been updated to 2.1.10 and the tevent package has been updated to 0.9.34, as they were needed by the updated samba.