E0268 needs to be updated to new format

From: src/test/compile-fail/E0268.rs

E0268 needs a span_label, updating it from: 

```
error[E0268]: `break` outside of loop
  --> src/test/compile-fail/E0268.rs:12:5
   |
12 |     break; //~ ERROR E0268
   |     ^^^^^
```

To:

```
error[E0268]: `break` outside of loop
  --> src/test/compile-fail/E0268.rs:12:5
   |
12 |     break; //~ ERROR E0268
   |     ^^^^^ cannot break outside of a loop
```
