Update Kubernetes to 493ee8b28560c118cebd2165ba9ef0959cfa2bc3

Signed-off-by: Lantao Liu <lantaol@google.com>

vendor/k8s.io/apimachinery/pkg/fields/selector.go

@@ -50,6 +50,9 @@ type Selector interface {
 
 	// String returns a human readable string that represents this selector.
 	String() string
+
+	// Make a deep copy of the selector.
+	DeepCopySelector() Selector
 }
 
 // Everything returns a selector that matches all fields.
@@ -99,6 +102,15 @@ func (t *hasTerm) String() string {
 	return fmt.Sprintf("%v=%v", t.field, EscapeValue(t.value))
 }
 
+func (t *hasTerm) DeepCopySelector() Selector {
+	if t == nil {
+		return nil
+	}
+	out := new(hasTerm)
+	*out = *t
+	return out
+}
+
 type notHasTerm struct {
 	field, value string
 }
@@ -138,6 +150,15 @@ func (t *notHasTerm) String() string {
 	return fmt.Sprintf("%v!=%v", t.field, EscapeValue(t.value))
 }
 
+func (t *notHasTerm) DeepCopySelector() Selector {
+	if t == nil {
+		return nil
+	}
+	out := new(notHasTerm)
+	*out = *t
+	return out
+}
+
 type andTerm []Selector
 
 func (t andTerm) Matches(ls Fields) bool {
@@ -207,6 +228,17 @@ func (t andTerm) String() string {
 	return strings.Join(terms, ",")
 }
 
+func (t andTerm) DeepCopySelector() Selector {
+	if t == nil {
+		return nil
+	}
+	out := make([]Selector, len(t))
+	for i := range t {
+		out[i] = t[i].DeepCopySelector()
+	}
+	return andTerm(out)
+}
+
 // SelectorFromSet returns a Selector which will match exactly the given Set. A
 // nil Set is considered equivalent to Everything().
 func SelectorFromSet(ls Set) Selector {