Kernel prepatch 4.17-rc1

Linus has released 4.17-rc1 and closed themerge window for this release. "This does not seem to be shaping upto be a particularly big release, and there seems to be nothingparticularly special about it. The most special thing that happened ispurely numerology: we've passed the six million git objects mark, and thatis reason enough to call the next kernel 5.0. Except I probably won't,because I don't want to be too predictable."