tns debug ios --watch fails on newly created app if there is already deployed app with the same app id

`tns debug ios --watch` fails on newly created app if there is an app with the same app id already deployed on the device/emulator. The CLI fails with the following error message:

```
ENOENT: no such file or directory, scandir '/Users/buhov/Desktop/MyApp/platforms/ios/build/emulator'
```