[clang] [clang][PAC] Add ptrauth.h helpers for type diversity helpers (PR #163456)

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``````````diff
diff --git a/clang/lib/Headers/ptrauth.h b/clang/lib/Headers/ptrauth.h
index 1de8324e1..ad28f06f0 100644
--- a/clang/lib/Headers/ptrauth.h
+++ b/clang/lib/Headers/ptrauth.h
@@ -246,10 +246,11 @@ typedef __UINTPTR_TYPE__ ptrauth_generic_signature_t;
 
    A call to this function is an integer constant expression. */
 #if __has_feature(ptrauth_function_pointer_type_discrimination)
-#define ptrauth_function_pointer_type_discriminator(__type) \
+#define ptrauth_function_pointer_type_discriminator(__type)                    \
   __builtin_ptrauth_type_discriminator(__type)
 #else
-#define ptrauth_function_pointer_type_discriminator(__type) ((ptrauth_extra_data_t)0)
+#define ptrauth_function_pointer_type_discriminator(__type)                    \
+  ((ptrauth_extra_data_t)0)
 #endif
 
 /* Compute a signature for the given pair of pointer-sized values.
@@ -383,7 +384,8 @@ typedef __UINTPTR_TYPE__ ptrauth_generic_signature_t;
   })
 
 #define ptrauth_type_discriminator(__type) ((ptrauth_extra_data_t)0)
-#define ptrauth_function_pointer_type_discriminator(__type) ((ptrauth_extra_data_t)0)
+#define ptrauth_function_pointer_type_discriminator(__type)                    \
+  ((ptrauth_extra_data_t)0)
 
 #define ptrauth_sign_generic_data(__value, __data)                             \
   ({                                                                           \

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https://github.com/llvm/llvm-project/pull/163456