E0267 needs to be updated to new format

[sophiajt]

From: src/test/compile-fail/E0267.rs

E0267 needs a span_label, updating it from:

error[E0267]: `break` inside of a closure
  --> src/test/compile-fail/E0267.rs:12:18
   |
12 |     let w = || { break; }; //~ ERROR E0267
   |                  ^^^^^

To:

error[E0267]: `break` inside of a closure
  --> src/test/compile-fail/E0267.rs:12:18
   |
12 |     let w = || { break; }; //~ ERROR E0267
   |                  ^^^^^ cannot break inside of a closure

[shyamsundarb-arch]

I will take this.

[shyamsundarb-arch]

A small doubt E0267 and E0268 has changes in the same file ("src\librustc_passes\loops.rs")...
Can I give a single commit to solve both these tickets?

[sophiajt]

Yes, please group them into one PR.