Use gx vendored go-ipfs-utils where possible

For the rest of the packages in util, move them to thirdparty
and update the references. util is gone!

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

rabin_test.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"github.com/ipfs/go-ipfs/blocks"
 	"github.com/ipfs/go-ipfs/blocks/key"
-	"github.com/ipfs/go-ipfs/util"
+	"gx/ipfs/QmZNVWh8LLjAavuQ2JXuFmuYH3C11xo988vSgp7UQrTRj1/go-ipfs-util"
 	"io"
 	"testing"
 )

splitting_test.go

@@ -5,7 +5,7 @@ import (
 	"io"
 	"testing"
 
-	u "github.com/ipfs/go-ipfs/util"
+	u "gx/ipfs/QmZNVWh8LLjAavuQ2JXuFmuYH3C11xo988vSgp7UQrTRj1/go-ipfs-util"
 )
 
 func randBuf(t *testing.T, size int) []byte {