[TIMOB-4628] Android: Titanium.buildHash is off by one character

To reproduce the failcase (and test the fix): * Run git log in your source folder and jot down the top build hash. * Build and release the SDK if you haven't already. * Build and run the app (app.js) below. In the failcase, you'll see only a 6-character build hash which is missing the first character of the real hash. In the fixed case, you'll see the full 7-character build hash. Here's the app.js:

Titanium.UI.setBackgroundColor('#000');
var win = Titanium.UI.createWindow({  
    title:'Test',
    backgroundColor:'#000',
	exitOnClose: true
});
win.add(Ti.UI.createTextArea({
	value: "Build Hash: " + Ti.buildHash +
			"\nBuild Date: " + Ti.buildDate +
			"\nTitanium Version: " + Ti.version,
	top: "25%",
	left: "10dp",
	right: "10dp",
	height: "200dp"
}));
win.open();