ices/91370.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#91370

extern {
    fn r() {
        impl Copy for u8 {}
    }
}

pub fn main() {}

=== stdout ===
=== stderr ===
error: incorrect function inside `extern` block
 --> /home/runner/work/glacier/glacier/ices/91370.rs:2:8
  |
1 |   extern {
  |   ------ `extern` blocks define existing foreign functions and functions inside of them cannot have a body
2 |       fn r() {
  |  ________^___-
  | |        |
  | |        cannot have a body
3 | |         impl Copy for u8 {}
4 | |     }
  | |_____- help: remove the invalid body: `;`
  |
  = help: you might have meant to write a function accessible through FFI, which can be done by writing `extern fn` outside of the `extern` block
  = note: for more information, visit https://doc.rust-lang.org/std/keyword.extern.html

error: aborting due to previous error

==============