libotp: add libraries after objects
    
    Add dependency on external libraries after dependency on internal
    objects so the linker can correctly pick up all symbols.
    
    https://pagure.io/freeipa/issue/7189
    
    Original patch by Rob Crittenden
    
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>