message: Create icu::UnicodeString with codepage, fixes normalize on Windows
diff: @@ -375,7 +375,7 @@ std::string ReaderUtil::Recode(const std::string& str_to_encode,
  std::string ReaderUtil::Normalize(const std::string &str) {
  #ifdef LCF_SUPPORT_ICU
  - icu::UnicodeString uni = icu::UnicodeString(str.c_str()).toLower();
  + icu::UnicodeString uni = icu::UnicodeString(str.c_str(), "utf-8").toLower();
  UErrorCode err = U_ZERO_ERROR;
  std::string res;
  const icu::Normalizer2* norm = icu::Normalizer2::getNFKCInstance(err);
  