L10nConvertStr

Implemented L10nConvertStr as only char* -> char* (type).
This may be used in other l10n functions, since it was designed to receive void* pointer.
Find **sizeof(size_t) is 4** (uint32_t?) in Guided Fate Paradox. Thank @B1ackDaemon for testing.
Changed log content for this function.
Would use windows sdk for code page transformation on windows.
Would need iconv to build on Linux/Mac.