[turbofan] Generalize AllocateStub to allow old space allocation.

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index 12f5618205040bc5262fae3e39a2444512bce611..378f0ce6f907f5fb4e5dee4f39f2128ce4e9f7bc 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -58,7 +58,7 @@ class PlatformInterfaceDescriptor;
   V(AllocateInt8x16)                          \
   V(AllocateUint8x16)                         \
   V(AllocateBool8x16)                         \
-  V(AllocateInNewSpace)                       \
+  V(Allocate)                                 \
   V(ArrayConstructorConstantArgCount)         \
   V(ArrayConstructor)                         \
   V(InternalArrayConstructorConstantArgCount) \
@@ -577,10 +577,9 @@ class AllocateMutableHeapNumberDescriptor : public CallInterfaceDescriptor {
                      CallInterfaceDescriptor)
 };
 
-
-class AllocateInNewSpaceDescriptor : public CallInterfaceDescriptor {
+class AllocateDescriptor : public CallInterfaceDescriptor {
  public:
-  DECLARE_DESCRIPTOR(AllocateInNewSpaceDescriptor, CallInterfaceDescriptor)
+  DECLARE_DESCRIPTOR(AllocateDescriptor, CallInterfaceDescriptor)
 };