runc: security bump to fix CVE-2016-9962

runc: security bump to fix CVE-2016-9962

RunC allowed additional container processes via runc exec to be ptraced by
the pid 1 of the container.  This allows the main processes of the
container, if running as root, to gain access to file-descriptors of these
new processes during the initialization and can lead to container escapes or
modification of runC state before the process is fully placed inside the
container.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>