[SeaBIOS] Commit 46ee83 changes guest fingerprint unconditionally

[anthony at codemonkey.ws]

 commit 46ee8349d22d11ec4b8609c5bf14db9409eef974
 Author: Gerd Hoffmann <kraxel at redhat.com>
 Date:   Thu Jun 7 10:34:31 2012 +0200

    update bios date
    
    Linux ignores some information from acpi in case the bios is old
    as acpi support used to be buggy in the early days.  This affects
    ressources for example (unless forced with pci=use_crs).  So lets
    go for something more recent.  With this patch applied the
    ressources for \\SB.PCI0 will show up in /proc/{iomem,ioports},
    tagged as "PCI Bus 0000:00".
    
    Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>

Breaks qemu-test:

*** Running tests ***
Running test /tests/finger-print.sh...		OK
--- fingerprints/pc-1.0.x86_64	2011-12-18 13:08:40.000000000 -0600
+++ fingerprint.txt	2012-08-22 13:22:29.000000000 -0500
@@ -57,7 +57,7 @@
 /sys/bus/pci/devices/0000:00:06.0/revision=0x00
 /sys/bus/pci/devices/0000:00:06.0/virtio/host-features=0x710006d4
 /sys/class/dmi/id/bios_vendor=Bochs
-/sys/class/dmi/id/bios_date=01/01/2007
+/sys/class/dmi/id/bios_date=01/01/2011
 /sys/class/dmi/id/bios_version=Bochs
 /sys/class/dmi/id/chassis_vendor=Bochs
 /sys/class/dmi/id/chassis_version=
Guest fingerprint changed for pc-1.0!

Can we make the bios date set from fw_cfg?  We really can't change the
SMBIOS information unconditionally like this.

Regards,

Anthony Liguori