[turbofan] Pass new.target to arguments adaptor trampoline.

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 06804e1d7895053a9b8b07617fc67d697db63343..58372e51ec83d5f34a78f1e4ec5ae9f39175a7ae 100644
--- a/src/ppc/interface-descriptors-ppc.cc
+++ b/src/ppc/interface-descriptors-ppc.cc
@@ -341,6 +341,7 @@ void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
       r4,  // JSFunction
+      r6,  // the new target
       r3,  // actual number of arguments
       r5,  // expected number of arguments
   };