Windows: Fix OS version determination for Windows >= 8

Windows: Fix OS version determination for Windows >= 8

First, try to determine the version of kernel32.dll by
using the version API. If that fails, loop using the
version macros, taking the major version into account.

Hangs in the minor version loop have been observed, potentially
related to the major version.

Task-number: QTBUG-43413
Change-Id: I982e78873510e7598c7cf839177e59812acd86f6
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
(cherry picked from qtbase/6796f2337ee31b4b4f07eaa54d868b999c39233a)
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>