tools: update certdata.txt

This is the certdata.txt[0] that ships in NSS 3.28.1, released on
2017-01-04.

[0] https://hg.mozilla.org/projects/nss/raw-file/NSS_3_28_1_RTM/lib/ckfw/builtins/certdata.txt

PR-URL: #12402
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Shigeki Ohtsu <ohtsu@ohtsu.org>

Author: bnoordhuis