Git: Really add new/existing files

Task-number: QTCREATORBUG-10117

Change-Id: Ic254cb2f7860ca0973cfda58cf66f62b1b8eaeb7
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
MsvcParser: Correctly parse ambiguous symbol error

Change-Id: I27a4e2e43209887b26c42163dd3234672c42967e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>