Add more test cases for GptInit() and fixed some bugs

src/platform/vboot_reference/cgptlib/crc32.h

Index: src/platform/vboot_reference/cgptlib/crc32.h
diff --git a/src/platform/vboot_reference/cgptlib/crc32.h b/src/platform/vboot_reference/cgptlib/crc32.h
new file mode 100644
index 0000000000000000000000000000000000000000..93dec3ed80f675fca491a754d9339b46504a8089
--- /dev/null
+++ b/src/platform/vboot_reference/cgptlib/crc32.h
@@ -0,0 +1,12 @@
+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef VBOOT_REFERENCE_GPT_CRC32_H_
+#define VBOOT_REFERENCE_GPT_CRC32_H_
+
+#include <stdint.h>
+
+uint32_t Crc32(const void *buffer, uint32_t len);
+
+#endif  /* VBOOT_REFERENCE_GPT_CRC32_H_ */