Add vendoring to containerd master

Initial vendor list validated with empty $GOPATH
and only master checked out; followed by `make`
and verified that all binaries build properly.
Updates require github.com/LK4D4/vndr tool.

Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>

vendor/github.com/crosbymichael/go-runc/utils.go

@@ -0,0 +1,45 @@
+package runc
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os/exec"
+	"strconv"
+	"syscall"
+)
+
+// ReadPidFile reads the pid file at the provided path and returns
+// the pid or an error if the read and conversion is unsuccessful
+func ReadPidFile(path string) (int, error) {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		return -1, err
+	}
+	return strconv.Atoi(string(data))
+}
+
+// runOrError will run the provided command.  If an error is
+// encountered and neither Stdout or Stderr was set the error and the
+// stderr of the command will be returned in the format of <error>:
+// <stderr>
+func runOrError(cmd *exec.Cmd) error {
+	if cmd.Stdout != nil || cmd.Stderr != nil {
+		return cmd.Run()
+	}
+	data, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("%s: %s", err, data)
+	}
+	return nil
+}
+
+const exitSignalOffset = 128
+
+// exitStatus returns the correct exit status for a process based on if it
+// was signaled or exited cleanly
+func exitStatus(status syscall.WaitStatus) int {
+	if status.Signaled() {
+		return exitSignalOffset + int(status.Signal())
+	}
+	return status.ExitStatus()
+}