tests/uefi-test-tools: report the SMBIOS entry point structures

tests/uefi-test-tools: report the SMBIOS entry point structures

On UEFI systems, the SMBIOS entry point (a.k.a. anchor) structures are
found similarly to the ACPI RSD PTR table(s): by scanning the
ConfigurationTable array in the EFI system table for well-known GUIDs.

Locate the SMBIOS 2.1 (32-bit) and 3.0 (64-bit) anchors in the
BiosTablesTest UEFI application, and report the addresses in new fields
appended to the BIOS_TABLES_TEST structure.

Cc: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Launchpad: https://bugs.launchpad.net/qemu/+bug/1821884
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>