pkg/mount: add MakeMount()
pkg/mount: add MakeMount()

This function ensures the argument is the mount point
(i.e. if it's not, it bind mounts it to itself).

Signed-off-by: Kir Kolyshkin <3a017b8ddb3f9cf3e4a59978b004111bdeb97f08@gmail.com>

moby/sys