Update OpenBIOS images

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Merge remote-tracking branch 'remotes/mcayland/tags/qemu-openbios-signed' into staging

Update OpenBIOS images

# gpg: Signature made Thu 04 Feb 2016 11:18:01 GMT using RSA key ID AE0F321F
# gpg: Good signature from "Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>"

* remotes/mcayland/tags/qemu-openbios-signed:
  Update OpenBIOS images

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

roms/openbios

@@ -1 +1 @@
-Subproject commit 3caee1794ac3f742315823d8447d21f33ce019e9
+Subproject commit bd95e4c193905d5ed867e96f1a720ce4cb53b59f