Use GET method for redirect in QDeclarativeXMLHttpRequest.

Initial-patch-by: Marek Więckowski <wiecko@fuw.edu.pl>

Task-number: QTBUG-32332
Change-Id: I393308134d60e484464e0cfc6cdcdac1edc27f8d
Reviewed-by: Peter Hartmann <phartmann@blackberry.com>
(cherry picked from qtquick1/e0f7b22341339b77aafa9150b0d79e320e9e4180)