Adds support for building arm64 Android.

runtime/vm/cpuinfo_android.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_ANDROID)
 
 #include "vm/cpuinfo.h"
 #include "vm/proccpuinfo.h"
 
 #include "platform/assert.h"
 
 namespace dart {
 
 CpuInfoMethod CpuInfo::method_ = kCpuInfoDefault;
 const char* CpuInfo::fields_[kCpuInfoMax] = {0};
 
 void CpuInfo::InitOnce() {
   // Initialize our read from /proc/cpuinfo.
   method_ = kCpuInfoSystem;
   ProcCpuInfo::InitOnce();
 
 #if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
   fields_[kCpuInfoProcessor] = "vendor_id";
   fields_[kCpuInfoModel] = "model name";
   fields_[kCpuInfoHardware] = "model name";
   fields_[kCpuInfoFeatures] = "flags";
-#elif defined(HOST_ARCH_ARM)
+#elif defined(HOST_ARCH_ARM) || defined(HOST_ARCH_ARM64)
   fields_[kCpuInfoProcessor] = "Processor";
   fields_[kCpuInfoModel] = "model name";
   fields_[kCpuInfoHardware] = "Hardware";
   fields_[kCpuInfoFeatures] = "Features";
 #elif defined(HOST_ARCH_MIPS)
   fields_[kCpuInfoProcessor] = "system type";
   fields_[kCpuInfoModel] = "cpu model";
   fields_[kCpuInfoHardware] = "cpu model";
   fields_[kCpuInfoFeatures] = "ASEs implemented";
 #else
@@ skipping 33 matching lines @@
 
 
 bool CpuInfo::HasField(const char* field) {
   ASSERT(method_ != kCpuInfoDefault);
   return ProcCpuInfo::HasField(field);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_ANDROID)