vendor: update buildkit to 2943a0838

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/k8s.io/apimachinery/pkg/util/json/json.go

@@ -66,11 +66,36 @@ func Unmarshal(data []byte, v interface{}) error {
 		// If the decode succeeds, post-process the map to convert json.Number objects to int64 or float64
 		return convertSliceNumbers(*v, 0)
 
+	case *interface{}:
+		// Build a decoder from the given data
+		decoder := json.NewDecoder(bytes.NewBuffer(data))
+		// Preserve numbers, rather than casting to float64 automatically
+		decoder.UseNumber()
+		// Run the decode
+		if err := decoder.Decode(v); err != nil {
+			return err
+		}
+		// If the decode succeeds, post-process the map to convert json.Number objects to int64 or float64
+		return convertInterfaceNumbers(v, 0)
+
 	default:
 		return json.Unmarshal(data, v)
 	}
 }
 
+func convertInterfaceNumbers(v *interface{}, depth int) error {
+	var err error
+	switch v2 := (*v).(type) {
+	case json.Number:
+		*v, err = convertNumber(v2)
+	case map[string]interface{}:
+		err = convertMapNumbers(v2, depth+1)
+	case []interface{}:
+		err = convertSliceNumbers(v2, depth+1)
+	}
+	return err
+}
+
 // convertMapNumbers traverses the map, converting any json.Number values to int64 or float64.
 // values which are map[string]interface{} or []interface{} are recursively visited
 func convertMapNumbers(m map[string]interface{}, depth int) error {