Update swift vendor for upstreamed change

Gets rid of deviation between hash and upstream.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

Godeps/Godeps.json

@@ -223,11 +223,11 @@
 		},
 		{
 			"ImportPath": "github.com/ncw/swift",
-			"Rev": "ce444d6d47c51d4dda9202cd38f5094dd8e27e86"
+			"Rev": "b964f2ca856aac39885e258ad25aec08d5f64ee6"
 		},
 		{
 			"ImportPath": "github.com/ncw/swift/swifttest",
-			"Rev": "ce444d6d47c51d4dda9202cd38f5094dd8e27e86"
+			"Rev": "b964f2ca856aac39885e258ad25aec08d5f64ee6"
 		},
 		{
 			"ImportPath": "github.com/spf13/cobra",

vendor/github.com/ncw/swift/README.md

@@ -137,3 +137,4 @@ Contributors
 - Stefan Majewsky <stefan.majewsky@sap.com>
 - Cezar Sa Espinola <cezarsa@gmail.com>
 - Sam Gunaratne <samgzeit@gmail.com>
+- Richard Scothern <richard.scothern@gmail.com>

vendor/github.com/ncw/swift/swift.go

@@ -1746,15 +1746,15 @@ func (c *Connection) Object(container string, objectName string) (info Object, h
 			return
 		}
 	}
-	//HACK
-	//Currently ceph doestn't return Last-Modified header for DLO manifest without any segments
-	//Currently it affects all versions of ceph http://tracker.ceph.com/issues/15812
+	// Currently ceph doesn't return a Last-Modified header for DLO manifests without any segments
+	// See ceph http://tracker.ceph.com/issues/15812
 	if resp.Header.Get("Last-Modified") != "" {
 		info.ServerLastModified = resp.Header.Get("Last-Modified")
 		if info.LastModified, err = time.Parse(http.TimeFormat, info.ServerLastModified); err != nil {
 			return
 		}
 	}
+
 	info.Hash = resp.Header.Get("Etag")
 	return
 }