[Interpreter] Add test for sloppy mode receiver replacement.

src/ppc/builtins-ppc.cc

Index: src/ppc/builtins-ppc.cc
diff --git a/src/ppc/builtins-ppc.cc b/src/ppc/builtins-ppc.cc
index 35873c3469df719e44e0b3c865f4840d58804724..de0eece7008828d022e5864c6b0d51c670a0a2f2 100644
--- a/src/ppc/builtins-ppc.cc
+++ b/src/ppc/builtins-ppc.cc
@@ -925,9 +925,6 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   //  - Support profiler (specifically profiling_counter).
   //  - Call ProfileEntryHookStub when isolate has a function_entry_hook.
   //  - Allow simulator stop operations if FLAG_stop_at is set.
-  //  - Deal with sloppy mode functions which need to replace the
-  //    receiver with the global proxy when called as functions (without an
-  //    explicit receiver object).
   //  - Code aging of the BytecodeArray object.
 
   // Perform stack guard check.