[llvm] [llvm][ELF]Add Shdr check for getBuildID (PR #126537)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

Looks good to me, once the other PR has been merged. Please update this PR once it has, and I'll give it one final look over.

https://github.com/llvm/llvm-project/pull/126537