[es6] [interpreter] Add tail calls support to Ignition.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index c0f5750351784b62d0f57247e94e22bc076487b7..fb0a7dcc6c67478d2f347a698a663c95187df597 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -2471,7 +2471,8 @@ void BytecodeGenerator::VisitCall(Call* expr) {
 
   builder()->SetExpressionPosition(expr);
   builder()->Call(callee, receiver, 1 + args->length(),
-                  feedback_index(expr->CallFeedbackICSlot()));
+                  feedback_index(expr->CallFeedbackICSlot()),
+                  expr->tail_call_mode());
   execution_result()->SetResultInAccumulator();
 }