- Refresh Xen patches (adjustments for pv-ops builds and a huge
  memory DomU boot fix).
- Linux 3.18.1.
- Delete
  patches.drivers/ALSA-usb-audio-Don-t-resubmit-pending-URBs-at-MIDI-e.
blk-mq: Fix uninitialized kobject at CPU hotplugging
(bnc#908794).
Merge branch 'master' into stable