qtest/bios-tables-test: Prepare for fixing the aarch64 viot test

The test misses a variant and this puts the mess on subsequent
rebuild-expected-aml.sh where a first DSDT reference blob is
overriden by another one.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20250714080639.2525563-18-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

tests/qtest/bios-tables-test-allowed-diff.h

@@ -1 +1,2 @@
 /* List of comma-separated changed AML files to ignore */
+"tests/data/acpi/aarch64/virt/DSDT.viot",