[stubs] Introduce ToNameStub to implement %_ToName.

src/mips64/interface-descriptors-mips64.cc

Index: src/mips64/interface-descriptors-mips64.cc
diff --git a/src/mips64/interface-descriptors-mips64.cc b/src/mips64/interface-descriptors-mips64.cc
index 7709f585c46c083cc4939d241e96951574a204e0..b5731db2f6d73fb15e6943c1a9211fafb6c0f09c 100644
--- a/src/mips64/interface-descriptors-mips64.cc
+++ b/src/mips64/interface-descriptors-mips64.cc
@@ -113,6 +113,10 @@ const Register ToStringDescriptor::ReceiverRegister() { return a0; }
 
 
 // static
+const Register ToNameDescriptor::ReceiverRegister() { return a0; }
+
+
+// static
 const Register ToObjectDescriptor::ReceiverRegister() { return a0; }