[clang] Basic, Sema: introduce `__attribute__((__personality__(...)))` (PR #185225)

[Erich Keane via cfe-commits]

================
@@ -9876,3 +9876,14 @@ of the same size, while the GCC/Itanium variant packs all fields in a bitfield
 tightly.
   }];
 }
+
+def PersonalityDocs : Documentation {
+  let Category = DocCatFunction;
+  let Content = [{
+``__attribute__((personality(<routine>)))`` is used to specify a personality
----------------
erichkeane wrote:

Can you better define what a 'personality' routine is?  Both for the purposes of documentation, as well as review.

https://github.com/llvm/llvm-project/pull/185225