Do superstructure initialization before going realtime

It does a lot of math in the constructor, which eventually runs into the
realtime resource limit.

Change-Id: Ie57dcc956019ce291f495c1af9a9040b706e7fcf
diff --git a/y2018/control_loops/superstructure/superstructure_main.cc b/y2018/control_loops/superstructure/superstructure_main.cc
index 04d245e..e8e1c7b 100644
--- a/y2018/control_loops/superstructure/superstructure_main.cc
+++ b/y2018/control_loops/superstructure/superstructure_main.cc
@@ -3,8 +3,9 @@
 #include "aos/linux_code/init.h"
 
 int main() {
-  ::aos::Init();
+  ::aos::InitNRT(true);
   ::y2018::control_loops::superstructure::Superstructure superstructure;
+  ::aos::GoRT();
   superstructure.Run();
   ::aos::Cleanup();
   return 0;