Linux 3.19 rc7

Everything seems to be fairly calm and normal, so this is likely to be
the last rc unless something unexpected suddenly comes up. Which means
that I'd like to see more people test-booting and running this puppy
just to check things out.

Fairly normal rc statistics - about 50% drivers, 20% arch updates
(mostly arm and arm64, some x86), with filesystems showing up a bit
more than usual (largely due to some quota changes), and the rest
being "misc" - perf tooling, some minor kernel and vm changes etc.

But it's all pretty small. Shortlog appended for the curious,