[automerger skipped] repack_bootimg: Update --ramdisk_add usages am: 3926660c74 -s ours

am skip reason: Merged-In Ia6fa3a2893440a1b143df57d8ee09d055503361c with SHA-1 b166bd7879 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/16334638

Change-Id: I720908a104aae1797f5f3cea42c59d92dad576e9