Update cAdvisor.

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

vendor/github.com/google/cadvisor/info/v1/container.go

@@ -330,6 +330,10 @@ type MemoryStats struct {
 	// Units: Bytes.
 	Usage uint64 `json:"usage"`
 
+	// Maximum memory usage recorded.
+	// Units: Bytes.
+	MaxUsage uint64 `json:"max_usage"`
+
 	// Number of bytes of page cache memory.
 	// Units: Bytes.
 	Cache uint64 `json:"cache"`
@@ -516,6 +520,29 @@ type FsStats struct {
 	WeightedIoTime uint64 `json:"weighted_io_time"`
 }
 
+type AcceleratorStats struct {
+	// Make of the accelerator (nvidia, amd, google etc.)
+	Make string `json:"make"`
+
+	// Model of the accelerator (tesla-p100, tesla-k80 etc.)
+	Model string `json:"model"`
+
+	// ID of the accelerator.
+	ID string `json:"id"`
+
+	// Total accelerator memory.
+	// unit: bytes
+	MemoryTotal uint64 `json:"memory_total"`
+
+	// Total accelerator memory allocated.
+	// unit: bytes
+	MemoryUsed uint64 `json:"memory_used"`
+
+	// Percent of time over the past sample period during which
+	// the accelerator was actively processing.
+	DutyCycle uint64 `json:"duty_cycle"`
+}
+
 type ContainerStats struct {
 	// The time of this stat point.
 	Timestamp time.Time    `json:"timestamp"`
@@ -530,6 +557,9 @@ type ContainerStats struct {
 	// Task load stats
 	TaskStats LoadStats `json:"task_stats,omitempty"`
 
+	// Metrics for Accelerators. Each Accelerator corresponds to one element in the array.
+	Accelerators []AcceleratorStats `json:"accelerators,omitempty"`
+
 	// Custom metrics from all collectors
 	CustomMetrics map[string][]MetricVal `json:"custom_metrics,omitempty"`
 }