ios: wait 5s after sucessful deploy

Ios 7.0.4 with xcode 5.0.2 seem to need a bit of time after installation
before running, otherwise the device might be locked up.
Task-number:QTCREATORBUG-10922s

Change-Id: I4d35d0c3b21407db7d0aa5f629d3fa51117d4ddd
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>