[iOS] Xcode project name is wrong

[dtopuzov]

Steps to reproduce:

1. Create TNS project with CLI
2. Add platform (iOS)
3. Build
4. Go to platform/ios and open .xcodeproj

Result:
Inside Xcode proejct is named "PROJECT_NAME" while I expect to see the name of TNS Project.

[dtopuzov]

Reason:
.xcodeproj contains .xcworkspace
If .xcworkspace is removed from .xcodeproj then project name in Xcode is OK