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/elf/test_something.rb

@@ -2,6 +2,7 @@ require_relative "helper"
 
 module Elf
   class SomethingTest < FullTest
+    include Preloader
 
     def test_add
       input = <<HERE
@@ -22,7 +23,7 @@ module Elf
       end
 HERE
       @exit_code = 4
-      check in_space(input) , "fibo"
+      check get_preload("Integer.lt;Integer.plus") + in_space(input) , "fibo"
     end
   end
 end

test/elf/test_somethingelse.rb

@@ -6,9 +6,10 @@ module Elf
     def test_string_put
       hello = "Hello World!\n"
       input = "return '#{hello}'.putstring"
+      preload = "class Word;def putstring;X.putstring;end;end;"
       @stdout = hello
       @exit_code = hello.length
-      check as_main(input), "hello"
+      check preload + as_main(input), "hello"
     end
   end
 end