Fixed wrong condition in QMacStyle.

Change-Id: I003e59bd50754dbbda23de5c55096ca2d25b7a7a
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Add winrt and winphone to the list of platform file selector names

Change-Id: Ifdab4184f048572c6f0e0496f6d6be2c5f92d1cc
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>