[automerger skipped] fix size of v3 boot header am: 41bec4c46b am: 82a5e8ba5b am: 220c365233 -s ours

am skip reason: Change-Id I709dacbf3552e09ff0705de45ac178a293971e2b with SHA-1 41bec4c46b is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/11050214

Change-Id: Idcdbc67aef4b8964a73edbfde1349dcd95c902c7