fix many tests with preloading

preloading, something akin to builtin, loads some very small predefined (macro) methods for the tests to work (ie call)

test/support/preloader.rb

@@ -0,0 +1,20 @@
+module Preloader
+  def builtin
+    {
+      "Integer.div4" => "def div4; X.div4;end",
+      "Integer.ge" => "def >; X.comparison(:>);end",
+      "Object.get" => "def get_internal_word(at); X.get_internal_word;end",
+    }
+  end
+  def get_preload(preload)
+    return "" unless preload
+    preload.split(";").collect do |loads|
+      raise "no preload #{loads}" unless builtin[loads]
+      clazz , meth = loads.split(".")
+      "class #{clazz}; #{builtin[loads]};end;"
+    end.join
+  end
+  def preload
+    get_preload(@preload)
+  end
+end