worldofgoo: don't strip debug symbols

The program fails to launch without this.

pkgs/by-name/wo/worldofgoo/package.nix

···
     patchelf --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" --set-rpath $libPath $out/bin/WorldOfGoo.bin.${arch}
   '';
 
+  dontStrip = true;
+
   meta = with lib; {
     description = "Physics based puzzle game";
     longDescription = ''