Update unit test for E0092

src/test/compile-fail/E0092.rs

@@ -11,7 +11,7 @@
 #![feature(intrinsics)]
 extern "rust-intrinsic" {
     fn atomic_foo(); //~ ERROR E0092
-}
+}                    //~| NOTE unrecognized atomic operation
 
 fn main() {
 }