dbus: security bump to version 1.10.16

dbus: security bump to version 1.10.16

>From http://www.openwall.com/lists/oss-security/2017/02/16/4

The latest dbus release 1.10.16 fixes two symlink attacks in
non-production-suitable configurations. I am treating these as bugs
rather than practical vulnerabilities, and very much hope neither of
these is going to affect any real users, but I'm reporting them to
oss-security in case there's an attack vector that I've missed.

No CVEs assigned so far.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>