[clang] [llvm] [SystemZ][z/OS] Update autoconversion functions to improve support for UTF-8 (PR #98652)

[via llvm-commits]

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@@ -326,7 +326,7 @@ ErrorOr<std::unique_ptr<File>>
 RealFileSystem::openFileForRead(const Twine &Name) {
   SmallString<256> RealName, Storage;
   Expected<file_t> FDOrErr = sys::fs::openNativeFileForRead(
-      adjustPath(Name, Storage), sys::fs::OF_None, &RealName);
+      adjustPath(Name, Storage), sys::fs::OF_Text, &RealName);
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cor3ntin wrote:

I don't think this is always valid, for eg. `#embed` - We should find a way to propagate that somehow

https://github.com/llvm/llvm-project/pull/98652