[automerger skipped] Support booting a chained boot-debug.img am: 9d7d26a5 -s ours
am: 112f452f -s ours
am skip reason: change_id Idfa8caffbb96f33702b1749afd2e2a59616ddba7 with SHA1 705fd7f5 is in history
Change-Id: I0fdb5731636175186366a88cfe7c6bc6df41afe1