Suddenly I saw now a new App ID in my (iOS Provisioning Portal) with description of (Xcode: Wildcard AppID), is it added recently by Apple or by me? But I never added it!
And there is no (configure) link for this App, only (details) link where I can't configure anything!
Regards
Xcode now creates a provisioning profile automatically, so that you don't have to. This wildcard app id is part of that provisioning profile.