Relax requirement from VFP3 to VFP2 where possible.

src/arm/cpu-arm.cc

 // Copyright 2006-2009 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 29 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 void CPU::SetUp() {
   CpuFeatures::Probe();
 }
 
 
 bool CPU::SupportsCrankshaft() {
-  return CpuFeatures::IsSupported(VFP3);
+  return CpuFeatures::IsSupported(VFP2);
 }
 
 
 void CPU::FlushICache(void* start, size_t size) {
   // Nothing to do flushing no instructions.
   if (size == 0) {
     return;
   }
 
 #if defined (USE_SIMULATOR)
@@ skipping 50 matching lines @@
 #if !defined (__arm__) || !defined(CAN_USE_ARMV5_INSTRUCTIONS)
   UNIMPLEMENTED();  // when building ARM emulator target
 #else
   asm volatile("bkpt 0");
 #endif
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM