tools: update certdata.txt

This is the latest certdata.txt from [0], last updated on 2014-10-08.

[0] https://hg.mozilla.org/mozilla-central/raw-file/f0bb13ef0ee4/security/nss/lib/ckfw/builtins/certdata.txt
crypto: update root certificates

Update the list of root certificates in src/node_root_certs.h with
tools/mk-ca-bundle.pl.