hacking method not found

was using exit, since raise is not implemented. This was ambiguous as all programs exit.
Using :died as special kernel code and bending it, and reporting it in interpreter.

test/mom/send/test_send_dynamic.rb

@@ -27,7 +27,7 @@ module Risc
     def test_sys
       produced = produce_body
       assert_equal Syscall , produced.next(29).class
-      assert_equal :exit , produced.next(29).name
+      assert_equal :died , produced.next(29).name
     end
     def test_load_address
       produced = produce_body