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/risc/interpreter/builtin/test_int_cmp.rb

@@ -6,6 +6,7 @@ module Risc
     class IntCmp < Minitest::Test
       include Ticker
       def setup
+        @preload = [:le,:ge,:gt,:lt].collect{|op| "Integer.#{op}"}.join(";")
       end
 
       def test_smaller_true

test/risc/interpreter/builtin/test_int_math.rb

@@ -5,6 +5,7 @@ module Risc
     class IntMath < Minitest::Test
       include Ticker
       def setup
+        @preload = "all"
       end
 
       def test_add