[clang] [llvm] [Clang][Darwin] Introduce `SubFrameworks` as a SDK default location (PR #115048)

[Cyndy Ishida via cfe-commits]

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@@ -255,16 +255,21 @@ static void stubifyDirectory(const StringRef InputPath, Context &Ctx) {
     if (EC)
       reportError(IT->path() + ": " + EC.message());
 
-    // Skip header directories (include/Headers/PrivateHeaders) and module
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cyndyishida wrote:

My suspicion of why the windows bot failed on the `stubify-delete` test is because the conditional includes the path style, which likely differs for a non-unix system. I changed it to omit "/"

https://github.com/llvm/llvm-project/pull/115048