[TIMOB-18176][TIMOB-18193] (3_5_X) iOS: Reporting correct architectures for 64bit

[TIMOB-18176](https://jira.appcelerator.org/browse/TIMOB-18176)
[TIMOB-18193](https://jira.appcelerator.org/browse/TIMOB-18193)

Test cases in tickets.

Cherry pick of #6475