package/libs/gettext-full: fix license

gettext-full only provides libintl which is not licensed under
GPL-3.0.-or-later but under LGPL-2.1-or-later as stated in
gettext-runtime/intl/COPYING.LIB

Fixes: c10d97484a (Add more license tags with SPDX identifiers)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/19943
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 13e10bb8d3)

package/libs/gettext-full/Makefile

@@ -18,7 +18,8 @@ PKG_BUILD_DIR:=$(BUILD_DIR)/gettext-$(PKG_VERSION)
 HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/gettext-$(PKG_VERSION)
 
 PKG_MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
-PKG_LICENSE:=GPL-3.0-or-later
+PKG_LICENSE:=LGPL-2.1-or-later
+PKG_LICENSE_FILES:=gettext-runtime/intl/COPYING.LIB
 PKG_CPE_ID:=cpe:/a:gnu:gettext
 
 PKG_INSTALL:=1