classes/insane.bbclass: Allow errors to be ignored

classes/insane.bbclass: Allow errors to be ignored
    Add a method to implement koen's skipping of
    errors of type .so in non dev package. This
    will turn into a list of known and acked issues which
    we decided to ignore. I do not yet know how to maintain
    such a list properly though
    Split the .so in non-dev package and the .debug in non-dbg
    package into two different packages