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/37-closure-lambda.scm

@@ -0,0 +1,62 @@
+;;; 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 (atom? x)
+  (if (pair? x) #f
+      (if (null? x) #f
+      #t)))
+
+(define (memq x lst)
+  (if (null? lst) #f
+      (if (eq? x (car lst)) lst
+          (memq x (cdr lst)))))
+
+(define (caar x) (car (car x)))
+(define (cadr x) (car (cdr x)))
+(define (cdar x) (cdr (car x)))
+(define (cddr x) (cdr (cdr x)))
+
+(define (loop first rest accum)
+  (core:display-error "\nloop\n  first=")
+  (core:write-error first)
+  (core:display-error "\n")
+  (core:display-error "  rest=")
+  (core:write-error rest)
+  (core:display-error "\n")
+  (core:display-error "  accum=")
+  (core:write-error accum)
+  (core:display-error "\n")
+  ((lambda (next)
+     (if (atom? first)
+         (next (cons (cons first
+                           (car rest)) accum))
+         (if (null? rest)
+             accum
+             (next accum))))
+   (lambda (a)
+     (core:display-error "\nnext a=")
+     (core:write-error a)
+     (core:display-error "\n")
+     (core:display-error "     rest=")
+     (core:write-error rest)
+     (core:display-error "\n")
+     (if (null? (cdr rest))
+         a
+         (loop (cadr rest) (cddr rest) a)))))
+
+(loop 'functions '(() 'globals ()) '())