Use forked archive/tar package

Use fork of archive/tar to carry changes to tar for
all go versions.

Signed-off-by: Derek McGowan <derek@mcgstyle.net>

archive/tar.go

@@ -1,7 +1,6 @@
 package archive
 
 import (
-	"archive/tar"
 	"context"
 	"fmt"
 	"io"
@@ -16,6 +15,7 @@ import (
 
 	"github.com/containerd/containerd/fs"
 	"github.com/containerd/containerd/log"
+	"github.com/dmcgowan/go-tar"
 	"github.com/pkg/errors"
 )
 

archive/tar_unix.go

@@ -3,12 +3,12 @@
 package archive
 
 import (
-	"archive/tar"
 	"os"
 	"sync"
 	"syscall"
 
 	"github.com/containerd/continuity/sysx"
+	"github.com/dmcgowan/go-tar"
 	"github.com/opencontainers/runc/libcontainer/system"
 	"github.com/pkg/errors"
 )

archive/tar_windows.go

@@ -1,13 +1,13 @@
 package archive
 
 import (
-	"archive/tar"
 	"errors"
 	"fmt"
 	"os"
 	"strings"
 
 	"github.com/containerd/containerd/sys"
+	"github.com/dmcgowan/go-tar"
 )
 
 // tarName returns platform-specific filepath