Vendor in latest c/common

Signed-off-by: Ashley Cui <acui@redhat.com>

vendor/github.com/containers/ocicrypt/utils/ioutils.go

@@ -18,9 +18,10 @@ package utils
 
 import (
 	"bytes"
-	"github.com/pkg/errors"
 	"io"
 	"os/exec"
+
+	"github.com/pkg/errors"
 )
 
 // FillBuffer fills the given buffer with as many bytes from the reader as possible. It returns
@@ -44,13 +45,15 @@ type Runner struct{}
 // ExecuteCommand is used to execute a linux command line command and return the output of the command with an error if it exists.
 func (r Runner) Exec(cmdName string, args []string, input []byte) ([]byte, error) {
 	var out bytes.Buffer
+	var stderr bytes.Buffer
 	stdInputBuffer := bytes.NewBuffer(input)
 	cmd := exec.Command(cmdName, args...)
 	cmd.Stdin = stdInputBuffer
 	cmd.Stdout = &out
+	cmd.Stderr = &stderr
 	err := cmd.Run()
 	if err != nil {
-		return nil, errors.Wrapf(err, "Error while running command: %s", cmdName)
+		return nil, errors.Wrapf(err, "Error while running command: %s. stderr: %s", cmdName, stderr.String())
 	}
 	return out.Bytes(), nil
 }