Introduce AllocateInNewSpace stub.

src/arm64/interface-descriptors-arm64.cc

Index: src/arm64/interface-descriptors-arm64.cc
diff --git a/src/arm64/interface-descriptors-arm64.cc b/src/arm64/interface-descriptors-arm64.cc
index 39df17a8b81ba75ac15f4208868a3b22f55d0ac4..4a95f652a5940cf6d4c7efcfaf504ab56dd76d36 100644
--- a/src/arm64/interface-descriptors-arm64.cc
+++ b/src/arm64/interface-descriptors-arm64.cc
@@ -242,6 +242,13 @@ void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
 }
 
 
+void AllocateInNewSpaceDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {x0};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void ArrayConstructorConstantArgCountDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // x1: function