added Telemetry (close #2535)

std/flash/utils/Telemetry.hx

@@ -0,0 +1,10 @@
+package flash.utils;
+
+@:require(flash11_4) @:native("flash.profiler.Telemetry") extern class Telemetry extends flash.events.EventDispatcher {
+	static var connected(default,null) : Bool;
+	static var spanMarker(default,null) : Float;
+	static function registerCommandHandler(commandName : String, handler : Dynamic) : Bool;
+	static function unregisterCommandHandler(commandName : String) : Bool;
+	static function sendMetric(metric : String, value : Dynamic) : Void;
+	static function sendSpanMetric(metric : String, startMarker : Float) : Void;
+}