A64: Fix some compile errors when building for Android.

src/platform-linux.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 40 matching lines @@
 #include <sys/stat.h>   // open
 #include <fcntl.h>      // open
 #include <unistd.h>     // sysconf
 #include <strings.h>    // index
 #include <errno.h>
 #include <stdarg.h>
 
 // GLibc on ARM defines mcontext_t has a typedef for 'struct sigcontext'.
 // Old versions of the C library <signal.h> didn't define the type.
 #if defined(__ANDROID__) && !defined(__BIONIC_HAVE_UCONTEXT_T) && \
-    defined(__arm__) && !defined(__BIONIC_HAVE_STRUCT_SIGCONTEXT)
+    (defined(__arm__) || defined(__aarch64__)) && \
+    !defined(__BIONIC_HAVE_STRUCT_SIGCONTEXT)
 #include <asm/sigcontext.h>
 #endif
 
 #undef MAP_TYPE
 
 #include "v8.h"
 
 #include "platform-posix.h"
 #include "platform.h"
 #include "v8threads.h"
@@ skipping 359 matching lines @@
   if (FLAG_break_on_abort) {
     DebugBreak();
   }
   abort();
 }
 
 
 void OS::DebugBreak() {
 // TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x,
 //  which is the architecture of generated code).
-#if defined(__aarch64__)
-  asm("hlt 0");
-#elif defined(__arm__) || defined(__thumb__)
+#if defined(__arm__) || defined(__thumb__)
   asm("bkpt 0");
+#elif defined(__aarch64__)
+  asm("brk 0");
 #elif defined(__mips__)
   asm("break");
 #elif defined(__native_client__)
   asm("hlt");
 #else
   asm("int $3");
 #endif
 }
 
 
@@ skipping 483 matching lines @@
   limit_mutex = CreateMutex();
 }
 
 
 void OS::TearDown() {
   delete limit_mutex;
 }
 
 
 } }  // namespace v8::internal