[12724] Restore mmap extractor build with CMake by adding preprocessor

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Автор: cala


<pre style='white-space:pre-wrap;width:81ex'>[12724] Restore mmap extractor build with CMake by adding preprocessor

Based on [12701] by @Cyberium</pre>


Подробнее... (https://github.com/cmangos/mangos-wotlk/commit/a934f45ff640038412da8e7f75b9e662ad4ff3e9)