A round of stable kernel updates

This round of kernel updates address a speculative-execution vulnerability foundin all Intel processors made since 2011. Greg Kroah-Hartman says in the 5.1.2 kernel patch: "Note, this release,and the other stable releases that are all being released right now at thesame time, just went out all contain patches that have only seen the"public eye" for about 5 minutes. So be forwarned, they might breakthings, they might not build, but hopefully they fix things. Odds are wewill be fixing a number of small things in this area for the next few weeksas things shake out on real hardware and workloads." In addition to5.1.2, stable kernels 5.0.16, 4.19.43, 4.14.119, and 4.9.176 are available. More information may befound in the Xensecurity advisory and this new in-kerneldocumentation.