[automerger skipped] fix size of vendor boot header am: 5bb77e1e36 -s ours

am skip reason: Change-Id Ib42222f29a7a75f552cc886437b8967f195227b5 with SHA-1 ba07d6e299 is in history

Change-Id: I181b43737fe54622c8dad1306cbc30efc1a27b79