Update for OS X Yosemite.

(Qt 4 equivalent of qtbase/203ce7c5ce36f300750607b74b2d2429be2d4959)
Change-Id: Icce8517d02dc70b545cf68a265e28083018b3225
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>