VBoot Reference: Add kernel rollback prevention and choosing logic.

src/platform/vboot_reference/tests/firmware_rollback_tests.c

Index: src/platform/vboot_reference/tests/firmware_rollback_tests.c
diff --git a/src/platform/vboot_reference/tests/firmware_rollback_tests.c b/src/platform/vboot_reference/tests/firmware_rollback_tests.c
index 0df0c3c2dedc67107c571d279dd47fac3f61454e..e36c003a28d1df3cd0350ace194ce1aac9311513 100644
--- a/src/platform/vboot_reference/tests/firmware_rollback_tests.c
+++ b/src/platform/vboot_reference/tests/firmware_rollback_tests.c
@@ -30,10 +30,10 @@ void VerifyFirmwareDriverTest(void) {
   g_firmware_key_version = 1;
   g_firmware_version = 1;
 
-  valid_firmwareA = GenerateRollbackTestImage(1, 1, 0);
-  valid_firmwareB = GenerateRollbackTestImage(1, 1, 0);
-  corrupt_firmwareA = GenerateRollbackTestImage(1, 1, 1);
-  corrupt_firmwareB = GenerateRollbackTestImage(1, 1, 1);
+  valid_firmwareA = GenerateRollbackTestFirmwareBlob(1, 1, 0);
+  valid_firmwareB = GenerateRollbackTestFirmwareBlob(1, 1, 0);
+  corrupt_firmwareA = GenerateRollbackTestFirmwareBlob(1, 1, 1);
+  corrupt_firmwareB = GenerateRollbackTestFirmwareBlob(1, 1, 1);
 
   TEST_EQ(VerifyFirmwareDriver_f(root_key_pub,
                                  valid_firmwareA, valid_firmwareB),