fix(ios): enable swift development in Titanium

[vijaysingh-axway]

https://jira.appcelerator.org/browse/TIMOB-28062

[vijaysingh-axway]

_build.js changes are from here with minor change.

[build]

	Fails
🚫	Tests have failed, see below for more information.

	Messages
📖	💾 Here's the generated SDK zipfile.
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.
📖	❌ 5 tests have failed There are 5 tests failing and 711 skipped out of 8086 total tests.

Tests:

Classname	Name	Time	Error
ios.ipad.Titanium.UI.ImageView	image error event (14.0)	5.001	Error: timeout of 5000ms exceeded file:///Users/build/Library/Developer/CoreSimulator/Devices/5B6B25D0-3445-48E0-97D6-199BBA69C78B/data/Containers/Bundle/Application/FEB49E63-56BA-46FD-A913-FEEC282BF822/mocha.app/ti-mocha.js:4326:27
ios.iphone.Titanium.Media.AudioPlayer	#start, #stop (14.0)	25.035	Error: timeout of 5000ms exceeded file:///Users/build/Library/Developer/CoreSimulator/Devices/B15C936C-AE26-45D6-BA6B-EC640E4DAA5A/data/Containers/Bundle/Application/04DE6308-B9D6-425D-89D8-594FE1B03092/mocha.app/ti-mocha.js:4326:27
ios.iphone.Titanium.UI.WebView	progress event (14.0)	10.002	Error: timeout of 10000ms exceeded file:///Users/build/Library/Developer/CoreSimulator/Devices/B15C936C-AE26-45D6-BA6B-EC640E4DAA5A/data/Containers/Bundle/Application/04DE6308-B9D6-425D-89D8-594FE1B03092/mocha.app/ti-mocha.js:4290:32
ios.iphone.Titanium.UI.WebView	html-script-tag (14.0)	10	Error: timeout of 10000ms exceeded file:///Users/build/Library/Developer/CoreSimulator/Devices/B15C936C-AE26-45D6-BA6B-EC640E4DAA5A/data/Containers/Bundle/Application/04DE6308-B9D6-425D-89D8-594FE1B03092/mocha.app/ti-mocha.js:4290:32
ios.iphone.Titanium.UI.WebView	.zoomLevel (14.0)	10	Error: timeout of 10000ms exceeded file:///Users/build/Library/Developer/CoreSimulator/Devices/B15C936C-AE26-45D6-BA6B-EC640E4DAA5A/data/Containers/Bundle/Application/04DE6308-B9D6-425D-89D8-594FE1B03092/mocha.app/ti-mocha.js:4290:32

Generated by 🚫 dangerJS against e339fae

[sgtcoolguy]

@vijaysingh-axway How do we verify this change?

[vijaysingh-axway]

@sgtcoolguy I updated 2 unit tests Ti.Platform.id and Ti.Platform.macaddress, which is dependent on a function func appIdentifier() -> String? (extension of TiUtils) which is defined in TiUtils+Addons.swift. If this unit test is successful, which means the swift development is enabled in titanium.