Move booting to RubyXCompiler init

Also pass the source into the compile method.
This way compiler can be reused for subsequent compile.
Does remove some double boots, but no major time save

lib/risc/linker.rb

@@ -125,13 +125,5 @@ module Risc
       risc_init = Branch.new( "__initial_branch__" , init.callable.binary )
       @platform.translator.translate(risc_init)
     end
-
   end
-
-  # module method to reset, and init
-  def self.boot!
-    Position.clear_positions
-    Builtin.boot_functions
-  end
-
 end