[llvm] [llvm-readobj][AArch64][ELF][PAC] Support ELF AUTH constants (PR #72713)

[James Henderson via llvm-commits]

================
@@ -1643,6 +1646,11 @@ enum {
   NT_ANDROID_TYPE_MEMTAG = 4,
 };
 
+// ARM note types
----------------
jh7370 wrote:

```suggestion
// ARM note types.
```
Nit

https://github.com/llvm/llvm-project/pull/72713