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/tests/boot.test

@@ -0,0 +1,61 @@
+#! /bin/sh
+# -*-scheme-*-
+if [ "$MES" != guile ]; then
+    MES_BOOT=boot-02.scm exec ${MES-mes} < $0
+fi
+exec ${MES-mes} --no-auto-compile -L ${0%/*} -L module -C module -e '(tests boot)' -s "$0" "$@"
+!#
+
+;;; -*-scheme-*-
+
+;;; 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-module (tests boot)
+  #:use-module (mes mes-0)
+  #:use-module (mes test))
+
+(cond-expand
+ (mes
+  (primitive-load "module/mes/test.scm"))
+ (guile-2)
+ (guile
+  (use-modules (ice-9 syncase))))
+
+(pass-if "first dummy" #t)
+(pass-if-not "second dummy" #f)
+
+(pass-if-eq "begin" 3 (begin 'a 'b (+ 1 2)))
+
+(define *top-define-a* '*top-define-a*)
+(begin (define *top-begin-define-a* '*top-begin-define-a*))
+(pass-if-eq "top define " '*top-define-a* *top-define-a*)
+
+(pass-if "eq?" (eq? 0 '0))
+
+(pass-if-eq "if" 'true (if #t 'true))
+(pass-if-eq "if 2" *unspecified* (if #f #f))
+(pass-if-eq "if 3" 'true (if #t 'true))
+(pass-if-eq "if 4" 'true (if (eq? 0 '0) 'true))
+(pass-if-eq "if 5" 'false (if (= 1 2) 'true 'false))
+
+(pass-if-eq "append2 1" '0 (append2 '() 0))
+(pass-if-eq "append2 3" 0 (append 0))
+(pass-if-eq "append2 4" 'cons (append2 (cdr '(c)) (car '(cons))))
+
+(result 'report)