Fix build for Windows Targets

[almann]

The CLI build does not work on Windows. Taking a really brief look, the problem is partially that release builds are not quite working on upstream Ion C on Windows, but even on debug builds, we are having symbol resolution problems because the paths are not lining up for the build artifacts as they do on Linux/macOS.

I suspect we should change upstream to push the libraries we need as an install target and use our cmake integration to depend on that rather than the build tree.