Use generated Neon version of MemCopy() on ARM, if platform supports it.

src/v8globals.h

 // 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 420 matching lines @@
                   CMOV = 15,   // x86
                   RDTSC = 4,   // x86
                   CPUID = 10,  // x86
                   VFP3 = 1,    // ARM
                   ARMv7 = 2,   // ARM
                   VFP2 = 3,    // ARM
                   SUDIV = 4,   // ARM
                   UNALIGNED_ACCESSES = 5,  // ARM
                   MOVW_MOVT_IMMEDIATE_LOADS = 6,  // ARM
                   VFP32DREGS = 7,  // ARM
+                  NEON = 8,    // ARM
                   SAHF = 0,    // x86
                   FPU = 1};    // MIPS
 
 
 // Used to specify if a macro instruction must perform a smi check on tagged
 // values.
 enum SmiCheckType {
   DONT_DO_SMI_CHECK,
   DO_SMI_CHECK
 };
@@ skipping 121 matching lines @@
 
 enum ClearExceptionFlag {
   KEEP_EXCEPTION,
   CLEAR_EXCEPTION
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8GLOBALS_H_