Stable kernels 5.8.5 and 5.7.19

Greg Kroah-Hartman has released the 5.8.5and 5.7.19 stable kernels with a relativelysmall number of fixes. Note that this is the last release for the 5.7.xkernel series, so users should move to 5.8.5 along with those on 5.8.x.