[llvm] [BOLT][AArch64] Detect veneers with missing data markers (PR #142069)

[Fangrui Song via llvm-commits]

MaskRay wrote:

> @MaskRay, any idea why LLD will sometimes omit `$d` for long absolute thunks?

This should not happen.... Was there a binary manipulation that stripped the mapping symbols?

https://github.com/llvm/llvm-project/pull/142069