NSDateComponents init should be public

Author: phausler

Foundation/NSCalendar.swift

@@ -1089,7 +1089,7 @@ public class NSDateComponents : NSObject, NSCopying, NSSecureCoding {
     internal var _calendar: NSCalendar?
     internal var _timeZone: NSTimeZone?
     internal var _values = [Int](count: 19, repeatedValue: NSDateComponentUndefined)
-    internal override init() {
+    public override init() {
         super.init()
     }