The Android Firebird 4.0 download comes without this file (spotted in this article)
https://sourceforge.net/p/zeoslib/wiki/How%20to%20use%20Firebird%204.0%20RC1%20with%20Zeos%20on%20Android/
Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
