Dont differentiate between ios_arm and ios_x64 in flutter_tools

All artifacts for iOS are universal.

packages/flutter_tools/lib/src/ios/devices.dart

diff --git a/packages/flutter_tools/lib/src/ios/devices.dart b/packages/flutter_tools/lib/src/ios/devices.dart
index c618a5f..33af902 100644
--- a/packages/flutter_tools/lib/src/ios/devices.dart
+++ b/packages/flutter_tools/lib/src/ios/devices.dart
@@ -229,7 +229,7 @@
   }
 
   @override
-  TargetPlatform get platform => TargetPlatform.ios_arm;
+  TargetPlatform get platform => TargetPlatform.ios;
 
   @override
   DeviceLogReader get logReader {