VCS: Make initialization of a repo trigger updateActions

Make initialization/cloning of a repo trigger an updateActions.

This is needed to e.g. enable git actions after a git repo is created.

Reviewed-by: Hugues Delorme
Change-Id: Ia8513a216e584fe8e512fdd5d6215aa96c075f3f
Reviewed-on: http://codereview.qt-project.org/4878


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>