jenkins: Mount binfmt misc in run_ct

The mountpoints.c test creates such mount and criu will try to
kerndat-check one, so this fs should be on "host".
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/jenkins/_run_ct

@@ -4,4 +4,5 @@ set -e
 mount --make-rprivate /
 umount -l  /proc
 mount -t proc proc /proc/
+mount -t binfmt_misc none /proc/sys/fs/binfmt_misc/
 exec "$@"