Add Seccomp-BPF policies to the repo.

These policies can be used with the Minijail tool
(http://git.chromium.org/gitweb/?p=chromiumos/platform/minijail.git)
to achieve kernel attack surface reduction.

(Also fix some trailing whitespace.)

BUG=chromium-os:36653
TEST=None

Change-Id: I35dd74702f7dfd701c86e1b25b0831d3925fbf96
Signed-off-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Merge pull request #59 from jlucangelio/add-seccomp-bpf-policies-v2

Add Seccomp-BPF policies to the repo. This needs documentation for use and so on.
Add changes by Jorge Lucangeli Obes to CHANGELOG
Add TODO items
Use /etc/tlsdate/ca-roots/tlsdate-ca-roots.conf for certs by default; allow setting file or dir
remove TÜRKTRUST from CA list post sub-ca mistakes
Update CHANGELOG
tlsdated: add dbus announcement support

Announce over DBus whenever we change the system time.

Signed-off-by: Elly Fong-Jones <ellyjones@chromium.org>
(cherry picked from commit eebf7b9605d1ad30a894d1249312ee63c21de797)