These shims are only needed on 32-bit x86. Additionally since https://reviews.llvm.org/rL268875 LLVM handles adding the shims itself for the intrinsics.

Give named fields to `struct PrivacyError`
Move `fn report_ambiguity_error` to `diagnostics.rs`

* Use `black_box` to avoid memory leak removal during optimization.
* Leak multiple objects to make test case more robust.

Don't use f64 shims for f32 cmath functions on non 32-bit x86 MSVC

These shims are only needed on 32-bit x86. Additionally since https://reviews.llvm.org/rL268875 LLVM handles adding the shims itself for the intrinsics.

resolve: Point at the private item definitions in privacy errors

A basic version of rust-lang#67951.
r? @estebank

Enable leak sanitizer test case

* Use `black_box` to avoid memory leak removal during optimization.
* Leak multiple objects to make test case more robust.

Remove unused auxiliary file that was replaced with rust_test_helpers