BootGuard: add fixture from Gigabyte laptop

taken from XMG_C404_V2_BIOS_B06_EC_001.zip
obtained from https://download.schenker-tech.de/package/xmg-c404/
This is originally a Gigabyte P34G v2, also sold as Schenker XMG C404.

Signed-off-by: Daniel Maslowski <info@orangecms.org>

Author: orangecms

pkg/intel/metadata/bg/bgbootpolicy/manifest_test.go

@@ -13,4 +13,5 @@ import (
 func TestReadWrite(t *testing.T) {
 	unittest.BGManifestReadWrite(t, &Manifest{}, "testdata/bpm.bin")
 	unittest.BGManifestReadWrite(t, &Manifest{}, "testdata/bpm2.bin")
+	unittest.BGManifestReadWrite(t, &Manifest{}, "testdata/bpm3.bin")
 }