[new compiler] Finish support for initializing list properties

[new compiler] Finish support for initializing list properties

Setting a value on a list property is always just appending to the list instead
of replacing it. Based on that, initializing list properties with multiple
items is done with one binding per item to the same list property. So

    myList: [ Item{}, Item{} ]

is mapped to

    myList: Item {}
    myList: Item {}

Change-Id: Iadc048ab3a8d73ac824aa6b2ae5dec33731fa362
Reviewed-by: Lars Knoll <lars.knoll@digia.com>