Intrinsic parameter error location is incorrect

When using a rust intrinsic, the error is located on the intrinsic declaration instead of the call location.

Extract from `rust/bswap.rs`:

```rust
extern "rust-intrinsic" {
    pub fn bswap<T>(x: T) -> T; // { dg-error "bswap intrinsics can only be used with basic integer types .got 'bool'." }
}

fn main() {
    let _ = bswap(true);
}

```