Update cgroups to c4b9ac5c7601384c965b9646fc51588

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

vendor/github.com/containerd/cgroups/blkio.go

@@ -86,6 +86,7 @@ func (b *blkioController) Stat(path string, stats *Metrics) error {
 	}
 	// Try to read CFQ stats available on all CFQ enabled kernels first
 	if _, err := os.Lstat(filepath.Join(b.Path(path), fmt.Sprintf("blkio.io_serviced_recursive"))); err == nil {
+		settings = []blkioStatSettings{}
 		settings = append(settings,
 			blkioStatSettings{
 				name:  "sectors_recursive",

vendor/github.com/containerd/cgroups/cgroup.go

@@ -497,6 +497,9 @@ func (c *cgroup) MoveTo(destination Cgroup) error {
 		}
 		for _, p := range processes {
 			if err := destination.Add(p); err != nil {
+				if strings.Contains(err.Error(), "no such process") {
+					continue
+				}
 				return err
 			}
 		}

vendor/github.com/containerd/cgroups/memory.go

@@ -281,6 +281,10 @@ func getMemorySettings(resources *specs.LinuxResources) []memorySettings {
 			name:  "limit_in_bytes",
 			value: mem.Limit,
 		},
+		{
+			name: "soft_limit_in_bytes",
+			value: mem.Reservation,
+		},
 		{
 			name:  "memsw.limit_in_bytes",
 			value: mem.Swap,