anki: fix build (ZHF)

pkgs/games/anki/default.nix

···
     buildInputs = [ python py.wrapPython lame mplayer libpulseaudio ];
 
     preConfigure = ''
-      substituteInPlace anki \
+      substituteInPlace anki/anki \
         --replace /usr/share/ $out/share/
 
       substituteInPlace Makefile \