* Move all trampoline compilation to `wasmtime-cranelift` This commit moves compilation of all the trampolines used in wasmtime behind the `Compiler` trait object to live in `wasmtime-cranelift`. The long-term goal of this is to enable depending on cranelift *only* from the `wasmtime-cranelift` crate, so by moving these dependencies we should make that a little more flexible. * Fix windows build