update cadvisor, docker, and runc godeps

vendor/github.com/opencontainers/runc/libcontainer/utils/utils_unix.go

@@ -4,8 +4,10 @@ package utils
 
 import (
 	"io/ioutil"
+	"os"
 	"strconv"
-	"syscall"
+
+	"golang.org/x/sys/unix"
 )
 
 func CloseExecFrom(minFd int) error {
@@ -25,9 +27,18 @@ func CloseExecFrom(minFd int) error {
 			continue
 		}
 
-		// intentionally ignore errors from syscall.CloseOnExec
-		syscall.CloseOnExec(fd)
+		// intentionally ignore errors from unix.CloseOnExec
+		unix.CloseOnExec(fd)
 		// the cases where this might fail are basically file descriptors that have already been closed (including and especially the one that was created when ioutil.ReadDir did the "opendir" syscall)
 	}
 	return nil
 }
+
+// NewSockPair returns a new unix socket pair
+func NewSockPair(name string) (parent *os.File, child *os.File, err error) {
+	fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM|unix.SOCK_CLOEXEC, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return os.NewFile(uintptr(fds[1]), name+"-p"), os.NewFile(uintptr(fds[0]), name+"-c"), nil
+}