E0225 needs to be updated to new format

[sophiajt]

From: src/test/compile-fail/E0225.rs

Error E0225 needs a span_label, updating it from:

error[E0225]: only the builtin traits can be used as closure or object bounds
  --> src/test/compile-fail/E0225.rs:12:32
   |
12 |     let _: Box<std::io::Read + std::io::Write>; //~ ERROR E0225
   |                                ^^^^^^^^^^^^^^

To:

error[E0225]: only the builtin traits can be used as closure or object bounds
  --> src/test/compile-fail/E0225.rs:12:32
   |
12 |     let _: Box<std::io::Read + std::io::Write>; //~ ERROR E0225
   |                                ^^^^^^^^^^^^^^ non-builtin trait used as bounds