[llvm] [llvm-debuginfo-analyzer] Add support for LLVM IR format. (PR #202120)

[Javier Lopez-Gomez via llvm-commits]

jalopezg-git wrote:

> > > I'd like to understand why are we getting [this message](https://github.com/llvm/llvm-project/pull/202120#issuecomment-4748432481) from 'LLVM ABI annotation checker'. Could you please take a quick look?
> > 
> > 
> > I am trying to reproduce the issue locally and see if the suggested change solves the warning.
> 
> The suggested change (add LLVM_ABI to the class) fixes the issue reported by the `check LLVM ABI annotations`.

Thank you, @CarlosAlbertoEnciso!  The change looks good -- I have also checked that it is consisted w/ the suggested use [here](https://github.com/llvm/llvm-project/blob/main/llvm/docs/InterfaceExportAnnotations.rst#annotation-macros).  I think this can now be merged :slightly_smiling_face:!

https://github.com/llvm/llvm-project/pull/202120