kernel security and bug fix update

2.6.32-754.OL6 - Update genkey bug 25599697 2.6.32-754 - powerpc 64s: Add support for a store forwarding barrier at kernel entry/exit Mauricio Oliveira 1581053 CVE-2018-3639 - x86 amd: Disable AMD SSBD mitigation in a VM Waiman Long 1580360 - x86 specctrl: Fix late microcode problem with AMD Waim...