avm2: Make Sprite.startDrag/stopDrag available to SWF 9

The versioning in playerglobal is incorrect - Flash Player
actually exposes this to SWF 9

core/src/avm2/globals/flash/display/Sprite.as

@@ -18,9 +18,7 @@ package flash.display {
         public native function get useHandCursor():Boolean;
         public native function set useHandCursor(useHandCursor:Boolean):void;
 
-        [API("667")]
         public native function startDrag(lockCenter:Boolean = false, bounds:Rectangle = null):void;
-        [API("667")]
         public native function stopDrag():void;
 
         public native function get hitArea():Sprite;

tests/tests/swfs/avm2/swf_9_versioning/Test.as

@@ -0,0 +1,16 @@
+package  {
+	
+	import flash.display.MovieClip;
+	import flash.display.Sprite;
+	
+	
+	public class Test extends MovieClip {
+		
+		
+		public function Test() {
+			trace("Sprite.startDrag: " + new Sprite().startDrag);
+			trace("Sprite.stopDrag : " + new Sprite().stopDrag);
+ 		}
+	}
+	
+}

tests/tests/swfs/avm2/swf_9_versioning/output.txt

@@ -0,0 +1,2 @@
+Sprite.startDrag: function Function() {}
+Sprite.stopDrag : function Function() {}

tests/tests/swfs/avm2/swf_9_versioning/test.toml

@@ -0,0 +1,2 @@
+# Note - 'test.swf' was manually edited in JPEXS to use SWF version 9
+num_ticks = 1