[crankshaft] Support inlining of function calls in tail position (in ES6 sense).

src/crankshaft/ppc/lithium-ppc.cc

Index: src/crankshaft/ppc/lithium-ppc.cc
diff --git a/src/crankshaft/ppc/lithium-ppc.cc b/src/crankshaft/ppc/lithium-ppc.cc
index 214e7711cade7030727af81cf1ca8aa4d473c730..84b032616b2aa4232284043beabdfaa8c748fa44 100644
--- a/src/crankshaft/ppc/lithium-ppc.cc
+++ b/src/crankshaft/ppc/lithium-ppc.cc
@@ -2433,7 +2433,7 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
   HConstant* undefined = graph()->GetConstantUndefined();
   HEnvironment* inner = outer->CopyForInlining(
       instr->closure(), instr->arguments_count(), instr->function(), undefined,
-      instr->inlining_kind());
+      instr->inlining_kind(), instr->syntactic_tail_call_mode());
   // Only replay binding of arguments object if it wasn't removed from graph.
   if (instr->arguments_var() != NULL && instr->arguments_object()->IsLinked()) {
     inner->Bind(instr->arguments_var(), instr->arguments_object());