MS-2480: [iOS] Upgrade Amazon Amazon SDK has not changed since last upgrade.  At v2.2.14. Added version.txt.
MS-2480: [iOS] Upgrade Amazon
Amazon SDK has not changed since last upgrade.  At v2.2.14.
Added version.txt.

appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios