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

[James Henderson via llvm-commits]

jh7370 wrote:

> So my only task now is to fix yaml2obj and verify that this PR passes the checks, right?

That and check that there is boundary condition testing already.

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