gccrs: [E0541] Use of unknown meta item

gcc/rust/ChangeLog:

	* backend/rust-compile-base.cc:
	Added ErrorCode.

gcc/testsuite/ChangeLog:

	* rust/compile/attr_deprecated_2.rs:
	Updated comment to pass the testcase.

Signed-off-by: Muhammad Mahad <mahadtxt@gmail.com>

gcc/rust/backend/rust-compile-base.cc

@@ -212,7 +212,8 @@ HIRCompileBase::handle_deprecated_attribute_on_fndecl (
 	    }
 	  else
 	    {
-	      rust_error_at (attr.get_locus (), "unknown meta item %qs",
+	      rust_error_at (attr.get_locus (), ErrorCode::E0541,
+			     "unknown meta item %qs",
 			     key_value.first.as_string ().c_str ());
 	    }
 	}

gcc/testsuite/rust/compile/attr_deprecated_2.rs

@@ -1,7 +1,7 @@
 #[deprecated(since="1.0")]
 fn test1() {}
 
-// { dg-excess-errors "unknown meta item ...." }
+// { dg-excess-errors "unknown meta item .invalid." }
 #[deprecated(invalid="invalid")]
 fn test2() {}