Kernel prepatch 4.2-rc8

In the end, Linus decided to hold off one more week and release 4.2-rc8 instead of the final 4.2 kernel."It's not like there are any real outstanding issues, and I waffledbetween just doing the release and doing another -rc. But we did haveanother low-level x86 issue come up this week, and together with thefact that a number of people are on vacation, I decided that waitingan extra week isn't going to hurt. But it was close. It's a fairlysmall rc8, and I really feel like it could have gone either way."