Merge remote-tracking branch 'remotes/kraxel/tags/pull-seabios-20160105-1' into staging

seabios: update to release 1.9.0

# gpg: Signature made Tue 05 Jan 2016 12:07:22 GMT 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-seabios-20160105-1:
  seabios: update binaries to release 1.9.0
  seabios: stop updating aml files
  seabios: update 128k bios config
  seabios: use new EXTRAVERSION to tag qemu builds
  seabios: update submodule to release 1.9.0

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