Merge "Re-add backtrace note about unreadable elf." am: 24b15570b1 am: f1204ae11a am: a6bbbcedb4 am: 19b4af0945

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1677039

Change-Id: Iffac51843dc2b29ac7beb69fedb4766ba438c2df