ios: do not stop in debugger when debuggings an app

the attached process is seen as still running just after the attach
and continuing fails, immediately later a spontaneous stop is
detected and on ios (where we set continueAfterAttach) we
continue after the spontanous stop.
This also work in the desktop case.

Change-Id: I92fbcd3ba319da7d9e664f67c8cbbea00f0daa43
Reviewed-by: hjk <hjk121@nokiamail.com>