Make arm32 cpu detection recognize the DragonBoard as arm64.

runtime/vm/cpuinfo_win.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "vm/cpuinfo.h"
 #include "vm/cpuid.h"
 
@@ skipping 11 matching lines @@
 void CpuInfo::InitOnce() {
   method_ = kCpuInfoCpuId;
 
   // Initialize the CpuId information.
   CpuId::InitOnce();
 
   fields_[kCpuInfoProcessor] = "Processor";
   fields_[kCpuInfoModel] = "Hardware";
   fields_[kCpuInfoHardware] = "Hardware";
   fields_[kCpuInfoFeatures] = "Features";
+  fields_[kCpuInfoArchitecture] = NULL;
 }
 
 
 void CpuInfo::Cleanup() {
   CpuId::Cleanup();
 }
 
 
 bool CpuInfo::FieldContains(CpuInfoIndices idx, const char* search_string) {
   ASSERT(method_ != kCpuInfoDefault);
@@ skipping 11 matching lines @@
   ASSERT(method_ != kCpuInfoDefault);
   return (strcmp(field, fields_[kCpuInfoProcessor]) == 0) ||
          (strcmp(field, fields_[kCpuInfoModel]) == 0) ||
          (strcmp(field, fields_[kCpuInfoHardware]) == 0) ||
          (strcmp(field, fields_[kCpuInfoFeatures]) == 0);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)