Fix errors with balena-engine update

Many uses of `balena-engine update` were failing, including a bunch of
integration tests. The reason is explained below.

The new version of runc we are using changed the way it handles
command-line arguments -- particularly, how one needs to pass `-` to
mean "read the desired container configuration from the standard input".
So, the Engine code was still invoking `runc` using the old syntax,
which caused `runc` to fail.

This commit just updates the `go-runc` dependency, which is the layer we
use to invoke `runc` from Go. This new `go-runc` version contains an
update to use the new syntax.

Signed-off-by: Leandro Motta Barros <leandro@balena.io>
Change-type: patch

vendor.conf

@@ -136,7 +136,7 @@ github.com/containerd/fifo                          650e8a8a179d040123db61f016cb
 github.com/containerd/continuity                    092b2c8f580622aee465fd5d6aba1dc8fad58b56 # v0.2.2
 github.com/containerd/cgroups                       1df78138f1e1e6ee593db155c6b369466f577651 # v1.0.3
 github.com/containerd/console                       b5cb846c9186d67bcae3ce3c324e47cd317d9527 # v1.0.3
-github.com/containerd/go-runc                       16b287bc67d069a60fa48db15f330b790b74365b
+github.com/containerd/go-runc                       0fe8e6011112dff316f9dc1649290d92fcbb02a7
 github.com/containerd/typeurl                       5e43fb8b75ed2f2305fc04e6918c8d10636771bc # v1.0.2
 github.com/containerd/ttrpc                         0247db16a1f98bb76731a12ad72b8d49705b38b3 # v1.1.0
 github.com/gogo/googleapis                          01e0f9cca9b92166042241267ee2a5cdf5cff46c # v1.3.2