Add mes and mescc-tools-extra

mescc-tools-extra contains two important tools:
- cp
- chmod

mes first builds itself from a mes 0.21 seed as used by guix, and then
builds a mes 0.22 and then mes 0.22 using that created mes 0.22.

It does /not/ use bootstrap.sh as we don't have a proper shell at this
point, it has been manually adapted for kaem.

sysa/mes-0.22/scaffold/micro-mes.c

@@ -0,0 +1,74 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#if SYSTEM_LIBC
+#error "SYSTEM_LIBC not supported"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef int SCM;
+
+#if __GNUC__
+int g_debug = 0;
+#endif
+
+int g_free = 0;
+
+SCM g_symbols = 0;
+SCM g_stack = 0;
+SCM r0 = 0;                     // a/env
+SCM r1 = 0;                     // param 1
+SCM r2 = 0;                     // save 2+load/dump
+SCM r3 = 0;                     // continuation
+
+SCM
+mes_environment ()
+{
+  return 0;
+}
+
+SCM
+bload_env (SCM a)               ///((internal))
+{
+  eputs ("bload_env\n");
+  return 0;
+}
+
+int
+main (int argc, char *argv[])
+{
+#if __GNUC__
+  g_debug = (int) getenv ("MES_DEBUG");
+#endif
+  //if (getenv ("MES_ARENA")) ARENA_SIZE = atoi (getenv ("MES_ARENA"));
+
+  // FIXME
+  //if (argc > 1 && !strcmp (argv[1], "--help")) return eputs ("Usage: mes [--dump|--load] < FILE\n");
+  //if (argc > 1 && !strcmp (argv[1], "--version")) {eputs ("Mes ");eputs (VERSION);return eputs ("\n");};
+
+  r0 = mes_environment ();
+
+  puts ("Hello micro-mes!\n");
+  SCM program = bload_env (r0);
+  int i = argc;
+  return i;
+}