Bump IFW version to 1.4.0-2

1.4.0-1 actually clashes with the commercial package names. Instead go
directly from 1.4.0 to 1.4.0-2.

Change-Id: If1444ef768d8badb3e867888ab63fefcb74e4bae
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>