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

[Juergen Ributzka via cfe-commits]

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@@ -347,6 +347,7 @@ void InitHeaderSearch::AddDefaultIncludePaths(
       } else {
         AddPath("/System/Library/Frameworks", System, true);
         AddPath("/Library/Frameworks", System, true);
+        AddPath("/System/Library/SubFrameworks", System, true);
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ributzka wrote:

The preference should be still SDK content, before we fall-back to `/Library/Frameworks`. There is also the concern that lookups will miss now in `/Library/Frameworks` first, before they hit in `/System/Library/SubFrameworks`.

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