test: Mark tst_QNetworkReply::backgroundRequestInterruption() as XFAIL on OS X 10.8

Task-number: QTBUG-32435
Change-Id: Ibc4495126b066c17e6a4477f403677b9fc9da453
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
tst_QIcon: Fix availableSizes() and task223279_inconsistentAddFile()

Copy some needed files into a local folder when QtWidgets is not
available.

Task-number: QTBUG-31993
Change-Id: I93b65bda198c22a60e979c119de8de683a78bb53
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>