Update cAdvisor.

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

vendor/github.com/google/cadvisor/machine/BUILD

@@ -16,6 +16,7 @@ go_library(
         "//vendor/github.com/google/cadvisor/utils/cloudinfo:go_default_library",
         "//vendor/github.com/google/cadvisor/utils/sysfs:go_default_library",
         "//vendor/github.com/google/cadvisor/utils/sysinfo:go_default_library",
+        "//vendor/golang.org/x/sys/unix:go_default_library",
     ],
 )
 

vendor/github.com/google/cadvisor/machine/info.go

@@ -22,7 +22,6 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
-	"syscall"
 
 	"github.com/google/cadvisor/fs"
 	info "github.com/google/cadvisor/info/v1"
@@ -31,6 +30,8 @@ import (
 	"github.com/google/cadvisor/utils/sysinfo"
 
 	"github.com/golang/glog"
+
+	"golang.org/x/sys/unix"
 )
 
 const hugepagesDirectory = "/sys/kernel/mm/hugepages/"
@@ -189,19 +190,11 @@ func ContainerOsVersion() string {
 }
 
 func KernelVersion() string {
-	uname := &syscall.Utsname{}
+	uname := &unix.Utsname{}
 
-	if err := syscall.Uname(uname); err != nil {
+	if err := unix.Uname(uname); err != nil {
 		return "Unknown"
 	}
 
-	release := make([]byte, len(uname.Release))
-	i := 0
-	for _, c := range uname.Release {
-		release[i] = byte(c)
-		i++
-	}
-	release = release[:bytes.IndexByte(release, 0)]
-
-	return string(release)
+	return string(uname.Release[:bytes.IndexByte(uname.Release[:], 0)])
 }

vendor/github.com/google/cadvisor/machine/machine.go

@@ -24,7 +24,6 @@ import (
 
 	// s390/s390x changes
 	"runtime"
-	"syscall"
 
 	info "github.com/google/cadvisor/info/v1"
 	"github.com/google/cadvisor/utils"
@@ -32,6 +31,8 @@ import (
 	"github.com/google/cadvisor/utils/sysinfo"
 
 	"github.com/golang/glog"
+
+	"golang.org/x/sys/unix"
 )
 
 var (
@@ -265,18 +266,13 @@ func addNode(nodes *[]info.Node, id int) (int, error) {
 
 // s390/s390x changes
 func getMachineArch() (string, error) {
-	uname := syscall.Utsname{}
-	err := syscall.Uname(&uname)
+	uname := unix.Utsname{}
+	err := unix.Uname(&uname)
 	if err != nil {
 		return "", err
 	}
 
-	var arch string
-	for _, val := range uname.Machine {
-		arch += string(int(val))
-	}
-
-	return arch, nil
+	return string(uname.Machine[:]), nil
 }
 
 // arm32 chanes