Merge remote-tracking branch 'remotes/kraxel/tags/pull-input-20160413-1' into staging

virtio-input; live migration support, various bugfixes.

# gpg: Signature made Wed 13 Apr 2016 16:41:27 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-input-20160413-1:
  virtio-input: support absolute axis config in pass-through
  input-linux: refine mouse detection
  virtio-input: fix emulated tablet axis ranges
  virtio-input: add live migration support
  virtio-input: implement pass-through evdev writes
  virtio-input: retrieve EV_LED host config bits
  virtio-input: add missing key mappings
  move const_le{16, 23} to qemu/bswap.h, add comment
  virtio-input: add parenthesis to const_le{16, 32}

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>