[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 c81cdc2b78a39c4dc0f7a5cb5effdc661529ab48..2dad518914804a115f2599c29185c7a468939f51 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -1413,6 +1413,12 @@ ExternalReference ExternalReference::vector_store_virtual_register(
 }
 
 
+ExternalReference ExternalReference::runtime_function_table_address() {
+  return ExternalReference(const_cast<Runtime::Function*>(
+      Runtime::FunctionForId(static_cast<Runtime::FunctionId>(0))));
+}
+
+
 double power_helper(double x, double y) {
   int y_int = static_cast<int>(y);
   if (y == y_int) {