fix vendor path.

We need to have a test case that fails when any dep path is not
vendored. (until we use gx fully that is, and vendor everything
with it)

License: MIT
Signed-off-by: Juan Batiz-Benet <juan@benet.ai>

dht/pb/dht.pb.go

@@ -14,7 +14,7 @@ It has these top-level messages:
 */
 package dht_pb
 
-import proto "github.com/gogo/protobuf/proto"
+import proto "github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/gogo/protobuf/proto"
 import math "math"
 
 // Reference imports to suppress errors if they are not otherwise used.