seabios: update to 1.8.1 stable release

-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQIcBAABAgAGBQJVBo+1AAoJEEy22O7T6HE4p+AP/jldL4e4ReSXUparSHuJYn0/
 8srhto9trUvW31kJCIl9D59TAKgsT7RFzEIwJynJXZUCeOGYGV12D23uhQLEG0+n
 Zi8yMM96LiyR+0/iWcN98n5VrX+0+LvDq/XZqAiDO9LQV2edEZqAIUH/SOnekyZz
 qZfO4xSvh3TpowjnoIAMaSFCta9DH2OI7HVpL0lVppAFFSZHcxUGukLobDHy6s3h
 X5KPNavvLhAuoZ18JojHIQxMHhBgq4K9AjjWfcNu5cgzBwxstB0moTbFBELVaHjV
 pOiJqu6jXkdR+I+BUv8kL8QpWOubzh6nKGKjSnXDaNvTidWeKANRzXxRlhx38yiR
 pri7dA52i/7k/1YFpLyKiWcLp0cBDTC+4rj3rnewxYsQDH2G9MkdEKHIPUNQkcG6
 DOZQsDjIerHWYzfobCoiooIvfNMVNukGb+Nu3BGe094vLM3lNRpte4FuGUtmqAUE
 MNPiAUZ4bK8nqI/C2Wqg+oappp1dJlTL6HmRM2+9/jUDLD0f2vpdGcuFBFsEQRkt
 j+a1JLQMHMdcjvdpPN/ryuqelJN9N5VjOfi8zA9z7EKw7fi5tNNnCjWagjB/1lfW
 NfkqCLlQCBJdwwJEz9gCBy7kT9agtxCu6lFm4kYmQ0OPD2pETYQMH1L9rE/NRG0v
 B/LQyt9WZrjqAgt+0U9m
 =pveO
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/kraxel/tags/pull-seabios-1.8.1-20150316-1' into staging

seabios: update to 1.8.1 stable release

# gpg: Signature made Mon Mar 16 08:09:25 2015 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-1.8.1-20150316-1:
  seabios: update to 1.8.1 stable release

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

roms/seabios

@@ -1 +1 @@
-Subproject commit 4c59f5d83044df4d57b90958b0fdfcecb913fddb
+Subproject commit 4adadbde6904807de2e990c0af839ad0cc977806