tools: update certdata.txt

This is the certdata.txt[0] that ships in Firefox 47 and NSS 3.23, last
updated on 2016-02-26.

[0] https://hg.mozilla.org/mozilla-central/raw-file/1f84dea6508d/security/nss/lib/ckfw/builtins/certdata.txt

PR-URL: #7363
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>