CI: Add missing dependency for debian
    
    All test failed due to missing /usr/bin/libtool
    
    e.g.
    /home/build/sssd/build/test-driver: line 107: libtool: command not found
    FAIL test-io (exit status: 127)
    
    Reviewed-by: Nikolai Kondrashov <Nikolai.Kondrashov@redhat.com>