Security update for samba (important)

This update for samba fixes the following issues:

Security issue fixed:

• CVE-2015-7560: Getting and setting Windows ACLs on symlinks can change
  permissions on link target; (bso#11648); (bsc#968222).

Bugs fixed:

• Fix leaking memory in libsmbclient: Add missing talloc stackframe;
  (bso#11177); (bsc#967017).
• Ensure samlogon fallback requests are rerouted after kerberos failure;
  (bsc#953382).
• Ensure attempt to ssh into locked account triggers "Your account is
  disabled…" to the console; (bsc#953382).
• Make the winbind package depend on the matching libwbclient version and
  vice versa; (bsc#936909).