Update error format for E0130

Author: trixnz

src/librustc_passes/ast_validation.rs

@@ -183,6 +183,7 @@ impl<'a> Visitor for AstValidator<'a> {
                                                    E0130,
                                                    "patterns aren't allowed in foreign function \
                                                     declarations");
+                    err.span_label(span, &format!("pattern not allowed in foreign function"));
                     if is_recent {
                         err.span_note(span,
                                       "this is a recent error, see issue #35203 for more details");

src/test/compile-fail/E0130.rs

@@ -9,7 +9,9 @@
 // except according to those terms.
 
 extern {
-    fn foo((a, b): (u32, u32)); //~ ERROR E0130
+    fn foo((a, b): (u32, u32));
+    //~^ ERROR E0130
+    //~| NOTE pattern not allowed in foreign function
 }
 
 fn main() {