build: align with overlay-patches policy + gnu-config + gettext fix

- .config: drop REDBEAR_RELEASE?=0.1.0 (was forcing offline)
- local/patches/gettext/01-external-gettext.patch (new): fix
  AM_GNU_GETTEXT arg for autopoint 0.23.1+. autopoint now requires
  'external' as first arg; gettext 0.22.5 used 'use-libtool'/'here'.
  Patched 3 files: gettext-tools, gettext-runtime, gettext-runtime/intl.
- recipes/tools/gettext/01-external-gettext.patch (symlink): durable
  source for the patch.
- recipes/tools/gettext/recipe.toml: fix source script for
  gettext 0.22.5:
  - Use /usr/share/aclocal (not /share/aclocal) — host sysroot is /.
  - Create missing m4/ subdirs in every configure.ac-bearing dir
    before autoreconf runs (newer aclocal needs them).
- src/cook/gnu-config/{config.sub,config.guess} (new): vendored
  copies so that GNU_CONFIG_GET succeeds even when offline and
  gitlab.redox-os.org is unreachable.

.config

@@ -1,2 +1 @@
 PODMAN_BUILD?=0
-REDBEAR_RELEASE?=0.1.0

recipes/tools/gettext/01-external-gettext.patch

@@ -0,0 +1 @@
+../../../local/patches/gettext/01-external-gettext.patch

recipes/tools/gettext/recipe.toml

@@ -4,17 +4,25 @@
 tar = "https://ftp.gnu.org/gnu/gettext/gettext-0.22.5.tar.gz"
 blake3 = "cb3f3a34da7ce1a92746df81f5b78c5d53841973a24eb80ab76537263d380ec0"
 patches = [
-    "redox.patch"
+    "redox.patch",
+    "01-external-gettext.patch"
 ]
 script = """
 DYNAMIC_INIT
 GNU_CONFIG_GET build-aux/config.sub
-( cd gettext-runtime/libasprintf && autoreconf -fvi -I${COOKBOOK_HOST_SYSROOT}/share/aclocal )
-( cd gettext-runtime/intl && autoreconf -fvi -I${COOKBOOK_HOST_SYSROOT}/share/aclocal )
-( cd gettext-runtime && autoreconf -fvi -I${COOKBOOK_HOST_SYSROOT}/share/aclocal )
-( cd gettext-tools && autoreconf -fvi -I${COOKBOOK_HOST_SYSROOT}/share/aclocal )
-( cd libtextstyle && autoreconf -fvi -I${COOKBOOK_HOST_SYSROOT}/share/aclocal )
-autoreconf -fvi -I${COOKBOOK_HOST_SYSROOT}/share/aclocal
+# Red Bear: gettext 0.22.5 expects m4/ dirs in every autoreconf-recursed
+# subdir before autoreconf can run. Create them where missing.
+mkdir -p m4
+find gettext-runtime gettext-tools libtextstyle -name configure.ac 2>/dev/null | while read ac; do
+    d="$(dirname "$ac")"
+    [ -d "$d/m4" ] || mkdir -p "$d/m4"
+done
+( cd gettext-runtime/libasprintf && autoreconf -fvi -I/usr/share/aclocal )
+( cd gettext-runtime/intl && autoreconf -fvi -I/usr/share/aclocal )
+( cd gettext-runtime && autoreconf -fvi -I/usr/share/aclocal )
+( cd gettext-tools && autoreconf -fvi -I/usr/share/aclocal )
+( cd libtextstyle && autoreconf -fvi -I/usr/share/aclocal )
+autoreconf -fvi -I/usr/share/aclocal
 """
 
 [build]