Skip iOS 32bit simulator tests by default

Author: shahmishal

utils/build-script

@@ -1802,7 +1802,8 @@ iterations with -O",
     skip_test_group.add_argument(
         "--skip-test-ios-32bit-simulator",
         help="skip testing iOS 32 bit simulator targets",
-        action=arguments.action.optional_bool)
+        action=arguments.action.optional_bool,
+        default=True)
     skip_test_group.add_argument(
         "--skip-test-ios-host",
         help="skip testing iOS device targets on the host machine (the phone "