Another pile of stable kernel updates

The5.13.4,5.12.19,5.10.52,5.4.134,4.19.198,4.14.240,4.9.276, and4.4.276stable updates have all been released. These are relatively large updatesonce again, and they include the fix for the just-disclosed local root vulnerability. Note that the5.12.x series ends with the 5.12.19 release.