update aws-sdk to support new region

vendor/github.com/aws/aws-sdk-go/private/protocol/xml/xmlutil/unmarshal.go

@@ -52,9 +52,15 @@ func parse(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
 	if t == "" {
 		switch rtype.Kind() {
 		case reflect.Struct:
-			t = "structure"
+			// also it can't be a time object
+			if _, ok := r.Interface().(*time.Time); !ok {
+				t = "structure"
+			}
 		case reflect.Slice:
-			t = "list"
+			// also it can't be a byte slice
+			if _, ok := r.Interface().([]byte); !ok {
+				t = "list"
+			}
 		case reflect.Map:
 			t = "map"
 		}