ices/94382.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#94382

#![feature(platform_intrinsics)]
#![feature(staged_api)]
struct u16x2(u16, u16);
extern "platform-intrinsic" {
    #[rustc_const_stable(feature = "foo", since = "1.3.37")]
    fn simd_extract<T, U>(x: T, idx: u32) -> U;
}
fn main() {
    const U: u16x2 = u16x2(13, 14);
    const V: u16x2 = U;
    const Y0: i8 = unsafe { simd_extract(V, 0) };
}

=== stdout ===
=== stderr ===
warning: type `u16x2` should have an upper camel case name
 --> /home/runner/work/glacier/glacier/ices/94382.rs:3:8
  |
3 | struct u16x2(u16, u16);
  |        ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `U16x2`
  |
  = note: `#[warn(non_camel_case_types)]` on by default

error: module has missing stability attribute
  --> /home/runner/work/glacier/glacier/ices/94382.rs:1:1
   |
1  | / #![feature(platform_intrinsics)]
2  | | #![feature(staged_api)]
3  | | struct u16x2(u16, u16);
4  | | extern "platform-intrinsic" {
...  |
11 | |     const Y0: i8 = unsafe { simd_extract(V, 0) };
12 | | }
   | |_^

error: aborting due to previous error; 1 warning emitted

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

[Alexendoo]

These (this + #1157, #1159, #1160) ICEs could be updated to add stability attributes and they'd still ICE, but I'm going to move them to fixed due to rust-lang/rust#94382 (comment)