vendor: update github.com/opencontainers/runc

when the systemd cgroup manager is used, controllers not handled by
systemd are created manually afterwards.
libcontainer didn't correctly cleanup these cgroups that were leaked
on cgroup v1.

Closes: https://github.com/kubernetes/kubernetes/issues/92766

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

vendor/github.com/opencontainers/runc/libcontainer/cgroups/systemd/common.go

@@ -27,6 +27,9 @@ var (
 	versionOnce sync.Once
 	version     int
 	versionErr  error
+
+	isRunningSystemdOnce sync.Once
+	isRunningSystemd     bool
 )
 
 // NOTE: This function comes from package github.com/coreos/go-systemd/util
@@ -37,11 +40,11 @@ var (
 // checks whether /run/systemd/system/ exists and is a directory.
 // http://www.freedesktop.org/software/systemd/man/sd_booted.html
 func IsRunningSystemd() bool {
-	fi, err := os.Lstat("/run/systemd/system")
-	if err != nil {
-		return false
-	}
-	return fi.IsDir()
+	isRunningSystemdOnce.Do(func() {
+		fi, err := os.Lstat("/run/systemd/system")
+		isRunningSystemd = err == nil && fi.IsDir()
+	})
+	return isRunningSystemd
 }
 
 // systemd represents slice hierarchy using `-`, so we need to follow suit when