Convert std::string to FString

[ningbeibei (NING YUAN)]

FString UE4Str = “UE4 C++ 包含中文”;
//FString to std::string

std::string cstr(TCHAR_TO_UTF8(*UE4Str));

//std::string to FString 需要使用UTF8_TO_TCHAR 在转一次

ClientMessage(FString(UTF8_TO_TCHAR(cstr.c_str())));