[clang-tools-extra] [include-cleaner] Handle symbols from system headers. (PR #66089)

[kadir çetinkaya via cfe-commits]

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@@ -176,6 +180,104 @@ headersForSpecialSymbol(const Symbol &S, const SourceManager &SM,
   return std::nullopt;
 }
 
+// A hand-mainained list of include mappings for system headers.
+// The first element is the suffix of the physical file path for the system
+// header, the second element is the final verbatim header spelling.
+const std::pair<llvm::StringRef, llvm::StringRef> IncludeMappings[] = {
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kadircet wrote:

we discussed offline that this list is mostly for demonstration purposes, but wanted to remind it once again. we probably want to start with at least what we have in clangd, right?

https://github.com/llvm/llvm-project/pull/66089