[clang] [clang] Move CCC_OVERRIDE_OPTIONS implementation to Driver (PR #85425)

[Dave Lee via cfe-commits]

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@@ -6677,3 +6678,136 @@ llvm::Error driver::expandResponseFiles(SmallVectorImpl<const char *> &Args,
 
   return llvm::Error::success();
 }
+
+namespace {
+
+const char *GetStableCStr(std::set<std::string> &SavedStrings, StringRef S) {
+  return SavedStrings.insert(std::string(S)).first->c_str();
+}
+
+/// applyOneOverrideOption - Apply a list of edits to the input argument lists.
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kastiglione wrote:

I will move it to the header file.

https://github.com/llvm/llvm-project/pull/85425