gnulib-l10n: add package

This package is a supplement for part of gettext
that uses gnulib sources, and includes the localizations
for messages specifically in gnulib files.

This is being added as a separate package
instead of a build target of gnulib
because that method of acquiring the localizations
requires the use of gettext and would be a reverse dependency.

Signed-off-by: Michael Pratt <mcpratt@pm.me>
Link: https://github.com/openwrt/openwrt/pull/16522
Signed-off-by: Robert Marko <robimarko@gmail.com>

package/libs/gnulib-l10n/Makefile

@@ -0,0 +1,37 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gnulib-l10n
+PKG_CPE_ID:=cpe:/a:gnu:$(PKG_NAME)
+PKG_VERSION:=20241231
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=@GNU/gnulib
+PKG_HASH:=155752ba6796aa294cde87c2bf0e771a5891eeeacb131345be0e080a3ec0ceea
+
+include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/package.mk
+
+define Package/gnulib-l10n
+  SECTION:=libs
+  CATEGORY:=Libraries
+  TITLE:=GNU Gnulib localization translation files
+  URL:=http://www.gnu.org/software/gnulib/
+endef
+
+define Package/gnulib-l10n/description
+ Localizations (translations) of messages for GNU gnulib code.
+endef
+
+HOST_CONFIGURE_ARGS += \
+	--localedir=$(HOST_BUILD_PREFIX)/share/locale
+
+define Host/Uninstall
+	-$(call Host/Compile/Default,uninstall)
+endef
+
+define Package/gnulib-l10n/install
+	$(call Build/Install/Default,install SUBDIRS='$(PKG_SUBDIRS)')
+endef
+
+$(eval $(call HostBuild))
+$(eval $(call BuildPackage,gnulib-l10n))