PPC: [stubs] Introduce ToNameStub to implement %_ToName.

src/ppc/interface-descriptors-ppc.cc

Index: src/ppc/interface-descriptors-ppc.cc
diff --git a/src/ppc/interface-descriptors-ppc.cc b/src/ppc/interface-descriptors-ppc.cc
index ed6914afaa47f5360f21b00d129045a82800b7c5..20641f5fb8326e206877d083a877ad11cad080dd 100644
--- a/src/ppc/interface-descriptors-ppc.cc
+++ b/src/ppc/interface-descriptors-ppc.cc
@@ -113,6 +113,10 @@ const Register ToStringDescriptor::ReceiverRegister() { return r3; }
 
 
 // static
+const Register ToNameDescriptor::ReceiverRegister() { return r3; }
+
+
+// static
 const Register ToObjectDescriptor::ReceiverRegister() { return r3; }