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

[Ruoyu Qiu via llvm-commits]

cabbaken wrote:

> The code change now looks good to me, but I think you need a test case for the new behaviour. This test should fail without your code change and pass with it.

I have update the test file in the latest commit~

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