Linux 4.13 rc7

Hmm. We had a few issues come up the past week, but nothing that is
really impacting the release schedule.

So here's rc7, and I still expect this to the the last rc, although
the best-laid plans of mice and men..

rc7 is pretty small, with most of the changes in drivers and
architecture as usual. That said, this time "most" is only _just_
true, we have enough other changes that drivers and arch fixes is only
about 60% of the patch. There's header files, VM, networking, core
kernel, documentation, scripts..

A mixed bag, in other words, but all pretty small fixes. You can scan
the shortlog, nothing stands out to me right now.