build-sys: build with Vista API by default

Both qemu & qga build with Vista API by default already, by defining
_WIN32_WINNT 0x0600. Set it globally in osdep.h instead.

This replaces WINVER by _WIN32_WINNT in osdep.h. WINVER doesn't seem
to be really useful these days.
(see also https://blogs.msdn.microsoft.com/oldnewthing/20070411-00/?p=27283)

Backports commit 56cdca1d7a6a9c8ce28287b8c986ac9ea87ba603 from qemu
This commit is contained in:
Marc-André Lureau 2019-01-13 20:28:49 -05:00 committed by Lioncash
parent 9ff8b70682
commit 585ebf50f7
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@ -63,8 +63,8 @@ typedef __float128 _Float128;
#ifdef _WIN32
/* as defined in sdkddkver.h */
#ifndef WINVER
#define WINVER 0x0501 /* XP */
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0600 /* Vista */
#endif
/* reduces the number of implicitly included headers */
#ifndef WIN32_LEAN_AND_MEAN