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/position/test_code_listener1.rb

@@ -2,11 +2,10 @@ require_relative "helper"
 
 module Risc
   class TestCodeListenerFull < MiniTest::Test
+    include ScopeHelper
     def setup
-      Parfait.boot!(Parfait.default_test_options)
-      Mom.boot!
-      Risc.boot!
-      @linker = Mom::MomCollection.new.to_risc.translate(:interpreter)
+      compiler = compiler_with_main()
+      @linker = compiler.to_target( :interpreter)
       @binary = Parfait::BinaryCode.new(1)
       @method = Parfait.object_space.types.values.first.methods
       @label = Risc.label("hi","ho")

test/risc/position/test_position3.rb

@@ -2,11 +2,10 @@ require_relative "helper"
 
 module Risc
   class TestMachinePositions < MiniTest::Test
+    include ScopeHelper
     def setup_for(platform)
-      Parfait.boot!(Parfait.default_test_options)
-      Mom.boot!
-      Risc.boot!
-      @linker = Mom::MomCollection.new.to_risc.translate(platform)
+      compiler = compiler_with_main()
+      @linker = compiler.to_target( platform)
       @linker.position_all
     end
     def test_cpu_init