On some machines the updates were already disabled, which lead
to the call to disable the service failing. Now we just move on without
error.

Change-Id: Ia48f7164c23dfe24e24548558d582cdc0190b7e3
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>