Enable stub generation using Hydrogen/Lithium (again)

src/arm/assembler-arm-inl.h

Index: src/arm/assembler-arm-inl.h
diff --git a/src/arm/assembler-arm-inl.h b/src/arm/assembler-arm-inl.h
index acd61feff89711daf952ae3714efc7c88a030545..7b79542e0c1ec55191550687a7d4963756fe9138 100644
--- a/src/arm/assembler-arm-inl.h
+++ b/src/arm/assembler-arm-inl.h
@@ -47,6 +47,15 @@ namespace v8 {
 namespace internal {
 
 
+ArmDoubleRegister ArmDoubleRegister::FromAllocationIndex(int index) {
+  if (CpuFeatures::IsSupported(VFP2)) {
+    return DwVfpRegister::FromAllocationIndex(index);
+  } else {
+    return SoftFloatRegister::FromAllocationIndex(index);
+  }
+}
+
+
 int DwVfpRegister::ToAllocationIndex(DwVfpRegister reg) {
   ASSERT(!reg.is(kDoubleRegZero));
   ASSERT(!reg.is(kScratchDoubleReg));