[TIMOB-18137][TIMOB-18131]Tijscore update

[vishalduggal]

Fixes the following tickets
TIMOB-18137
TIMOB-18135
TIMOB-18118
TIMOB-18131

This PR does the following.
Removes dependency on WTF-iOS, JavaScriptCore-iOS and ToolExecutable-iOS xcconfig files

Modifies the message and stack properties on the ErrorInstance object to be enumerable so they can be grabbed on the Titanium side.

Disables the LLINT_C_LOOP execution model and enables JIT(DFG_JIT, FTL_JIT and YARR_JIT are still disabled)

There is also a new build script that builds WTF and JavaScriptCore on a per architecture basis so the logs the output to a text file so build errors are easy to track down.

[jonalter]

CR & FT pass

Test code below

var Cloud = require('ti.cloud');

// Create a window
var win = Ti.UI.createWindow({
    backgroundColor : 'white',
    layout: 'vertical'
});
win.open();

addButton({
    title: 'null undefined',
    callback: function(e) {
        var result;
        if (result == null || result == undefined ) {
            console.log('YES');
        } else {
            console.log('NO');
        }
    }
});

addButton({
    title: 'null',
    callback: function(e) {
        var b = null;
        if (b != null) 
        { 
            // do something
            console.log('YES');
        } else {
            console.log('NO');
        }
    }
});

addButton({
    title: 'fail',
    callback: function(e) {
        var test = {};
        test.pipo();
    }
});

function addButton(params) {
    var button = Ti.UI.createButton({
        top: 40,
        title: params.title
    });
    button.addEventListener('click', function() {
        params.callback();
    });
    win.add(button);
}