test/link: actually run tests requiring symlinks on non-Win
Fixes regression introduced by https://github.com/ziglang/zig/commit/5d5e89aa8d5a454bce2c93555d3bc7c7ae1aa162
Turns out since landing that PR we haven't run any tests requiring
symlinks or any Apple SDK on a macOS host. Not great.
d78968c1b5Jakub Konka committed on 5/22/2024, 12:59:32 PMparent5fe9f88