Build: fix make install in asn1 subdirectory
    
    Most of the logic was unnecessary and wrong. This caused make install to fail.
    
    This commit removes unnecessary declarations and creates static library
    which is not installed. make install in asn1 subdirectory is now passing
    (and doing nothing).
    
    https://fedorahosted.org/freeipa/ticket/6418
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>