[turbofan] Add support for tail-calling a runtime function with 6 arguments.

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index c7d42369b9bf8f014bb6ada0a3b6f0e73a3bc616..ded9dad094eb94cac3558cda8c67e91d76cbdb59 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -744,6 +744,10 @@ class RawMachineAssembler {
   // Tail call to a runtime function with five arguments.
   Node* TailCallRuntime5(Runtime::FunctionId function, Node* arg1, Node* arg2,
                          Node* arg3, Node* arg4, Node* arg5, Node* context);
+  // Tail call to a runtime function with six arguments.
+  Node* TailCallRuntime6(Runtime::FunctionId function, Node* arg1, Node* arg2,
+                         Node* arg3, Node* arg4, Node* arg5, Node* arg6,
+                         Node* context);
 
   // ===========================================================================
   // The following utility methods deal with control flow, hence might switch