go.crypto: use golang.org/x/... import paths

LGTM=bradfitz
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/167190043
diff --git a/ssh/session_test.go b/ssh/session_test.go
index cc26573..fce9868 100644
--- a/ssh/session_test.go
+++ b/ssh/session_test.go
@@ -14,7 +14,7 @@
 	"math/rand"
 	"testing"
 
-	"code.google.com/p/go.crypto/ssh/terminal"
+	"golang.org/x/crypto/ssh/terminal"
 )
 
 type serverType func(Channel, <-chan *Request, *testing.T)