Update cAdvisor.

Also update golang.org/x/sys because of google/cadvisor#1786

vendor/github.com/google/cadvisor/info/v2/container.go

@@ -146,6 +146,8 @@ type ContainerStats struct {
 	Filesystem *FilesystemStats `json:"filesystem,omitempty"`
 	// Task load statistics
 	Load *v1.LoadStats `json:"load_stats,omitempty"`
+	// Metrics for Accelerators. Each Accelerator corresponds to one element in the array.
+	Accelerators []v1.AcceleratorStats `json:"accelerators,omitempty"`
 	// Custom Metrics
 	CustomMetrics map[string][]v1.MetricVal `json:"custom_metrics,omitempty"`
 }

vendor/github.com/google/cadvisor/info/v2/conversion.go

@@ -142,6 +142,9 @@ func ContainerStatsFromV1(containerName string, spec *v1.ContainerSpec, stats []
 		if spec.HasCustomMetrics {
 			stat.CustomMetrics = val.CustomMetrics
 		}
+		if len(val.Accelerators) > 0 {
+			stat.Accelerators = val.Accelerators
+		}
 		// TODO(rjnagal): Handle load stats.
 		newStats = append(newStats, stat)
 	}