[php] Wrong addbytes for BytesBuffer

[flashultra]

The code below will return for Eval target:

1) Ki: 36363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636
2) Ki: 3636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363600000001

but will give wrong result for php:

1) Ki: 36363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636
2) Ki: 00000001

Here is the example:

		var Ki = new haxe.io.BytesBuffer();
		var msg = Bytes.ofHex("00000001");
		var key = Bytes.ofHex("00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
		for (i in 0...key.length) {
			Ki.addByte(key.get(i) ^ 0x36);
		}
		trace("1) Ki: "+Ki.getBytes().toHex());
		Ki.add(msg);
		trace("2) Ki: "+Ki.getBytes().toHex());

Tested on Haxe 4.3.1