[TIMOB-5434] Android: require() in a non-root context breaks any include() statements below it.

If an app has a second (or third, or fourth...) Javascript execution context (via a window being opened with a url property), a require() statement anywhere in that context will break any include() statements below it. Reproduction of the failcase (and test of the fix): In a new app use this app.js:

Ti.UI.createWindow({
	url: "win.js", // causes new JS context
	backgroundColor: "#000",
	exitOnClose: true
}).open();

And this win.js:

require("module"); // Don't need return value, just important that this runs.
Ti.include("included.js");
alert("The included word is " + includedWord);

And this module.js:

exports.x = function() {}; //not important

And this included.js:

var includedWord = "test";

When you run that, you'll get an error in the failcase, saying that includedWord is not defined. When testing the fix, you should see an alert dialog telling you "The included word is test".