Merge pull request RustPython#2047 from youknowone/windows-note

Windows build note for failing part

Author: youknowone

vm/src/frozen.rs

@@ -18,6 +18,7 @@ pub fn get_module_inits() -> HashMap<String, FrozenModule> {
     // Python modules that the vm calls into, but are not actually part of the stdlib. They could
     // in theory be implemented in Rust, but are easiest to do in Python for one reason or another.
     // Includes _importlib_bootstrap and _importlib_bootstrap_external
+    // For Windows: did you forget to run `powershell scripts\symlinks-to-hardlinks.ps1`?
     ext_modules!(dir = "Lib/python_builtins/");
 
     #[cfg(not(feature = "freeze-stdlib"))]