MOBILE-3947 ng: Increase build memory size

Author: NoelDeMartin

package.json

@@ -21,7 +21,7 @@
     "ng": "ng",
     "start": "ionic serve --browser=$MOODLE_APP_BROWSER --ssl",
     "serve:test": "NODE_ENV=testing ionic serve --no-open",
-    "build": "ionic build --configuration=development",
+    "build": "NODE_OPTIONS=--max-old-space-size=8192 ionic build --configuration=development",
     "build:prod": "NODE_ENV=production ionic build --prod",
     "build:test": "NODE_ENV=testing ionic build --configuration=testing",
     "dev:android": "concurrently \"npm run dev:android:app\" \"npm run dev:android:cordova\"",