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/scripts/mescc.in

@@ -0,0 +1,65 @@
+#! @BASH@
+
+# GNU Mes --- Maxwell Equations of Software
+# Copyright © 2018,2019 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 [ "$V" = 2 ]; then
+    set -x
+fi
+
+MES_ARENA=${MES_ARENA-20000000}
+export MES_ARENA
+
+MES_MAX_ARENA=${MES_MAX_ARENA-${MES_ARENA}}
+export MES_MAX_ARENA
+
+MES_STACK=${MES_STACK-5000000}
+export MES_STACK
+
+MES_PREFIX=${MES_PREFIX-@prefix@}
+export MES_PREFIX
+
+GUILE_LOAD_PATH=@guile_site_dir@${GUILE_LOAD_PATH+:}${GUILE_LOAD_PATH}
+export GUILE_LOAD_PATH
+
+MES=${MES-@prefix@/bin/mes}
+bindir=${bindir-@bindir@}
+includedir=${includedir-@includedir@}
+export includedir
+libdir=${libdir-@libdir@}
+export libdir
+numbered_arch=${numbered_arch=@numbered_arch@}
+export numbered_arch
+
+if [ ! -f $bindir/mescc.scm ]; then
+   bindir=$(dirname $0)
+fi
+
+sep=
+if [ "$(basename ${SCHEME-$MES})" = "mes" ]; then
+    sep=--
+fi
+
+${SCHEME-$MES} \
+    --no-auto-compile\
+    -e main\
+    -L @guile_site_dir@\
+    -C @guile_site_ccache_dir@\
+    $bindir/mescc.scm\
+    $sep\
+    "$@"