bump up rootlesskit to v0.4.1
Now the child process is killed when the parent dies (rootless-containers/rootlesskit#66)
https://github.com/rootless-containers/rootlesskit/compare/e92d5e7...27a0c7a
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
(cherry picked from commit 00c92a671933c0e3f9b67940746d31144902929f)
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>