libvpx: Pull from upstream

source/libvpx/vp8/common/generic/systemdependent.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 27 matching lines @@
     int core_count = 16;
 
 #if HAVE_UNISTD_H && !defined(__OS2__)
 #if defined(_SC_NPROCESSORS_ONLN)
     core_count = sysconf(_SC_NPROCESSORS_ONLN);
 #elif defined(_SC_NPROC_ONLN)
     core_count = sysconf(_SC_NPROC_ONLN);
 #endif
 #elif defined(_WIN32)
     {
+#if _WIN32_WINNT >= 0x0501
+        SYSTEM_INFO sysinfo;
+        GetNativeSystemInfo(&sysinfo);
+#else
         PGNSI pGNSI;
         SYSTEM_INFO sysinfo;
 
         /* Call GetNativeSystemInfo if supported or
          * GetSystemInfo otherwise. */
 
         pGNSI = (PGNSI) GetProcAddress(
                 GetModuleHandle(TEXT("kernel32.dll")), "GetNativeSystemInfo");
         if (pGNSI != NULL)
             pGNSI(&sysinfo);
         else
             GetSystemInfo(&sysinfo);
+#endif
 
         core_count = sysinfo.dwNumberOfProcessors;
     }
 #elif defined(__OS2__)
     {
         ULONG proc_id;
         ULONG status;
 
         core_count = 0;
         for (proc_id = 1; ; proc_id++)
@@ skipping 20 matching lines @@
 #if CONFIG_MULTITHREAD
     ctx->processor_core_count = get_cpu_count();
 #endif /* CONFIG_MULTITHREAD */
 
 #if ARCH_ARM
     ctx->cpu_caps = arm_cpu_caps();
 #elif ARCH_X86 || ARCH_X86_64
     ctx->cpu_caps = x86_simd_caps();
 #endif
 }