Move to /usr prefix.

- This is much more standard and replaces /image in sysa and is the
  standard in sysc (avoids many issues).
- GCC needs to have a file created for some unknown reason.
- Checksums updated.

sysa/texinfo-6.7/import-gnulib.sh

@@ -1,37 +0,0 @@
-#!/bin/sh
-
-# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
-#
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-../gnulib-b81ec69/gnulib-tool --import \
-    --lib=libgnu \
-    --source-base=gnulib/lib \
-    --m4-base=gnulib/m4 \
-    --doc-base=doc \
-    --tests-base=tests \
-    --aux-dir=build-aux \
-    --conditional-dependencies \
-    --no-libtool \
-    --macro-prefix=gl \
-    --no-vc-files \
-    argz \
-    getopt-gnu \
-    gettext-h \
-    iconv \
-    mbchar \
-    mbiter \
-    mbscasecmp \
-    mbschr \
-    mbslen \
-    mbsncasecmp \
-    mbsstr \
-    mbswidth \
-    memrchr \
-    regex \
-    stdarg \
-    strcasestr \
-    strdup-posix \
-    strerror \
-    vasprintf \
-    xalloc