Swift: Enable SwiftMixLib Test on Windows
The SwiftMixLib test was failing on Windows due to a missing link against swiftCore. On macOS and Linux, there are mechanisms for extracting the libraries that the object depends on and passing that to the linker so that the library dependencies don't need to be listed explicitly. The Windows Swift toolchain does not have this mechanism.
In the future, it would likely make sense for CMake to pass some of the
implicitly required libraries for linking Swift via
CMAKE_Swift_IMPLICIT_LINK_LIBRARIES
. Unlike the normal mechanisms
though, these libraries would need to be passed even when the link
language is Swift.
For now though, we should get the test up and running again.
Fixes: #25573 (closed)
Topic-rename: swift-test-windows
Edited by Brad King