[llvm] Create a EncodingConverter class with both iconv and icu support. (PR #138893)

[Abhina Sree via llvm-commits]

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+//===-- EncodingConverter.h - Encoding conversion class -----------*- C++ -*-=//
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abhina-sree wrote:

Thanks, I've renamed the filenames to TextEncoding and the class to TextEncodingConverter now

https://github.com/llvm/llvm-project/pull/138893