[Interpreter] Add CallRuntime support to the interpreter.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 357d50d0934bed9c90afd6801e5a9e18dd8270c6..444e82dc9cb5b3dfe08d29f0c474e68280b521bf 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -1445,6 +1445,13 @@ ExternalReference ExternalReference::vector_store_virtual_register(
 }
 
 
+ExternalReference ExternalReference::runtime_function_table_address(
+    Isolate* isolate) {
+  return ExternalReference(
+      const_cast<Runtime::Function*>(Runtime::RuntimeFunctionTable(isolate)));
+}
+
+
 double power_helper(double x, double y) {
   int y_int = static_cast<int>(y);
   if (y == y_int) {