Add 'recovery_key' in Google Binary Block (GBB) utility

src/platform/vboot_reference/vboot_firmware/include/gbb_header.h

Index: src/platform/vboot_reference/vboot_firmware/include/gbb_header.h
diff --git a/src/platform/vboot_reference/vboot_firmware/include/gbb_header.h b/src/platform/vboot_reference/vboot_firmware/include/gbb_header.h
index d1f84a837aa9b08558b3db0691cf39eafab15626..8f34435a57b92af0ebf411b625bd01f9da053e88 100644
--- a/src/platform/vboot_reference/vboot_firmware/include/gbb_header.h
+++ b/src/platform/vboot_reference/vboot_firmware/include/gbb_header.h
@@ -35,8 +35,10 @@ typedef struct GoogleBinaryBlockHeader {
   uint32_t rootkey_size;    // Root Key size in bytes
   uint32_t bmpfv_offset;    // BMP FV offset from header
   uint32_t bmpfv_size;      // BMP FV size in bytes
+  uint32_t recovery_key_offset;  // Recovery Key offset from header
+  uint32_t recovery_key_size;    // Recovery Key size in bytes
 
-  uint8_t  pad[88];         // to match GBB_HEADER_SIZE
+  uint8_t  pad[80];         // to match GBB_HEADER_SIZE
 } GoogleBinaryBlockHeader;
 
 #ifdef __cplusplus
@@ -44,4 +46,3 @@ typedef struct GoogleBinaryBlockHeader {
 #endif  // __cplusplus
 
 #endif  /* VBOOT_REFERENCE_GBB_HEADER_H_ */
-