As I understand the LGPL - not a lawyer - you have to somehow enable all your users to relink your application against a different version of Skip (4.d.0 since 4.d.1 isn't possible on iOS). This means that your application must do something like include a copy of all the files that went into linking the application and convey that to the users along with your application, with scripts to build the application against a different version of Skip...

I can't imagine the app store would be particularly amused with this during app review... though I've never tried.