[ALOY-1541] XML: Require LeftNavButtons/RightNavButtons not working

<Alloy>
	<NavigationWindow>
		<Window class="container">
			<Require src="navbar" />
			<Label id="label">Hello, World</Label>
		</Window>
	</NavigationWindow>
</Alloy>

<Alloy>
	<LeftNavButtons>
		<Button>Btn1</Button>
		<Button>Btn2</Button>
	</LeftNavButtons>
</Alloy>

    var leftNavButtons = [];
    $.__views.__alloyId2 = Ti.UI.createButton({
        title: "aaa",
        id: "__alloyId2"
    });
    leftNavButtons.push($.__views.__alloyId2);
    $.__views.__alloyId3 = Ti.UI.createButton({
        title: "bbb",
        id: "__alloyId3"
    });
    leftNavButtons.push($.__views.__alloyId3);
    // >>>>> THIS IS THE ERROR <<<<< //
    void 0.leftNavButtons = leftNavButtons;
    $.__views.navbar && $.addTopLevelView($.__views.navbar);

    $.__views.__alloyId2 = Ti.UI.createButton({
        title: "Btn1",
        id: "__alloyId2"
    });
    __parentSymbol.leftNavButton = $.__views.__alloyId2;
    $.__views.navbar && $.addTopLevelView($.__views.navbar);