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/boot/2f-define-second-lambda.scm

@@ -0,0 +1,48 @@
+;;; GNU Mes --- Maxwell Equations of Software
+;;; Copyright © 2018 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/>.
+
+(define display core:display)
+(define write core:write)
+
+;; unmemoize removes formal caching...but only one level
+(define (foo doit bar)
+  (define baz
+    (lambda (doit)
+      (display "   baz:doit=")
+      (write doit)
+      (display "   baz:bar=")
+      (write bar)
+      (display "\n")
+      (doit bar)))
+  (display "foo doit=")
+  (write doit)
+  (display "\n")
+  (display " bar=")
+  (write bar)
+  (display "\n")
+  (display "  baz=")
+  (write baz)
+  (display "\n")
+  (baz doit))
+
+(foo display 1)
+(display "foo=")
+(write foo)
+(display "\n")
+(foo exit 0)
+(exit 1)