renaming mom builtin to macro

lib/vool/builtin.rb

@@ -1,5 +1,5 @@
 module Vool
-  module Builtin
+  module Macro
     def self.boot_methods(options)
       return if options[:boot_methods] == false
       load_builtin( :int_plus )

lib/vool/yield_statement.rb

@@ -39,7 +39,7 @@ module Vool
       check = Mom::NotSameCheck.new(compile_method , runtime_method, ok_label)
       # TODO? Maybe create mom instructions for this
       #builder = compiler.builder("yield")
-      #Risc::Builtin.exit_sequence(builder)
+      #Risc::Macro.exit_sequence(builder)
       #check << builder.built
       check << ok_label
     end