[clang] [Clang][attr] Add 'kcfi_salt' attribute (PR #141846)

[Kees Cook via cfe-commits]

================
@@ -3643,6 +3643,64 @@ make the function's CFI jump table canonical. See :ref:`the CFI documentation
   }];
 }
 
+def KCFISaltDocs : Documentation {
+  let Category = DocCatFunction;
+  let Content = [{
----------------
kees wrote:

Please add a "Heading" and "Label" here so that it can be referenced externally (e.g. in Linux's `include/linux/compiler_attributes.h` file).

https://github.com/llvm/llvm-project/pull/141846