[llvm] [llvm-debuginfo-analyzer] Add support for LLVM IR format. (PR #135440)

[Javier Lopez-Gomez via llvm-commits]

================
@@ -13,10 +13,11 @@ SYNOPSIS
 DESCRIPTION
 -----------
 :program:`llvm-debuginfo-analyzer` parses debug and text sections in
-binary object files and prints their contents in a logical view, which
-is a human-readable representation that closely matches the structure
-of the original user source code. Supported object file formats include
-ELF, Mach-O, WebAssembly, PDB and COFF.
+binary object files and textual IR representations and prints their
+contents in a logical view, which is a human readable representation
+that closely matches the structure of the original user source code.
+Supported object file formats include ELF, Mach-O, WebAssembly, PDB,
+COFF, IR (textual representation and bitcode).
----------------
jalopezg-git wrote:

```suggestion
COFF, and IR (textual representation and bitcode).
```

https://github.com/llvm/llvm-project/pull/135440