creating embed files

[thradams]

Today #embed expand the sequence For instance

  static const char file_txt[] = {
   #embed "stdio.h"
   ,0
  };

becomes

static const char file_txt[] = {
    35,112,113, /*... lot more ... */ 10
   ,0
  };

The idea of this feature is add an option to generate a file with "embed_" prefix that is included resulting in.

  static const char file_txt[] = {
   #include "embed_stdio.h"
   ,0
  };

that looks much more like the original version.