[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
+enum {
+  NT_ARM_TYPE_PAUTH_ABI_TAG = 1,
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jh7370 wrote:

I think I have a few (small) concerns with this:
1) It's potentially possible (admittedly unlikely) that the name could be specified for something different in the future, so you'd have to modify existing sites to use a different name.
2) Giving it a name means people will search for the string in the docs and not find it, potentially causing confusion in the future.

I don't know who is in charge of those docs, but is it possible to update them to specifically name the NT_* value? That would resolve my concern.

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