CMake: Fix the comment about versions. [skip ci]

[tcpdump] / tests / olsr-oobr-2.out

    1  [Invalid header: caplen==0]
    2  [Invalid header: caplen==0]
    3  2018-12-20 19:48:15.8389398 IP6 (flowlabel 0x06400, hlim 0, next-header UDP (17), payload length 5401) 0:24::1e:a0a:141e.698 > 38fd:7f49:eaff:ffff:2025:7373:7562:2573.2: OLSRv6, seq 0x0201, length 5393 [|olsr]