Kernel prepatch 4.7-rc1

Linus has released 4.7-rc1 and closed themerge window for this release, saying "this time around we havea fairly big change to the vfs layer that allows filesystems (if theybuy into it) to do readdir() and path component lookup in parallelwithin the same directory.That's probably the biggest conceptual vfs change we've had since westarted doing cached pathname lookups using RCU." The code name hasbeen changed to "Psychotic Stoned Sheep."