update vendor

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

vendor/github.com/opencontainers/runc/man/runc-exec.8.md

@@ -0,0 +1,30 @@
+# NAME
+   runc exec - execute new process inside the container
+
+# SYNOPSIS
+   runc exec [command options] <container-id> -- <container command> [args...]
+
+Where "<container-id>" is the name for the instance of the container and
+"<container command>" is the command to be executed in the container.
+
+# EXAMPLE
+For example, if the container is configured to run the linux ps command the
+following will output a list of processes running in the container:
+
+       # runc exec <container-id> ps
+
+# OPTIONS
+   --console value                          specify the pty slave path for use with the container
+   --cwd value                              current working directory in the container
+   --env value, -e value                    set environment variables
+   --tty, -t                                allocate a pseudo-TTY
+   --user value, -u value                   UID (format: <uid>[:<gid>])
+   --additional-gids value, -g value        additional gids
+   --process value, -p value                path to the process.json
+   --detach, -d                             detach from the container's process
+   --pid-file value                         specify the file to write the process id to
+   --process-label value                    set the asm process label for the process commonly used with selinux
+   --apparmor value                         set the apparmor profile for the process
+   --no-new-privs                           set the no new privileges value for the process
+   --cap value, -c value                    add a capability to the bounding set for the process
+   --no-subreaper                           disable the use of the subreaper used to reap reparented processes