Lots of preloading for tests

so many relied (implicitly( on some builtin function
after all can't do much in ruby without calling
Now all those dependencies are explicit
Small risc changes come because the macro version has a return label and unreachable label

test/mom/macro/test_set_internal_byte.rb

@@ -9,13 +9,13 @@ module Mom
       end
       def test_mom_length
         assert_equal :set_internal_byte , @method.callable.name
-        assert_equal 5 , @method.mom_instructions.length
+        assert_equal 7 , @method.mom_instructions.length
       end
       def test_compile
         assert_equal Risc::MethodCompiler , @method.to_risc.class
       end
       def test_risc_length
-        assert_equal 17 , @method.to_risc.risc_instructions.length
+        assert_equal 20 , @method.to_risc.risc_instructions.length
       end
     end
   end